Date and timestamp in excel

The Date and Timestamp is a type of data type that determines the date and time of a particular region. It contains some characters along with some encoded data. This format may vary from language to language. Keeping track of date and time helps in managing records of our work as well as segregate the information day-wise. In this article, we will be going to learn how we can automatically insert Date and Timestamp in Excel.

There are multiple ways to insert Date and Timestamp in Excel. These methods include both static and dynamic methods.

1. Inserting Date And Timestamp using keyboard shortcuts (Static method)

The static method is helpful when there are only a few cells where you need to insert the Date and Timestamp. You can quickly use the keyboard shortcut to manually insert the Date and Timestamp.

Follow the below steps to implement the same:

• Select the cell into which the current date or time needs to be inserted.
• Use this shortcut – Ctrl + ; (Control + semicolon) to insert the current date.
• Use this shortcut – Ctrl + Shift + ; (Control + Shift + semicolon) to insert the current time.
• Use this shortcut – Press the combination (Ctrl + ;) and (Ctrl + Shift + ;) to insert the current time and time.

2. Inserting Date And Timestamp using  Formulas:

The NOW() and TODAY() functions can be used to insert the current date and time that will update automatically. This method dynamically updates the date-time whenever a change is made in the worksheet.

1. NOW(): To insert current date and time.
2. TODAY(): To insert the current date.

Follow the below steps to implement the same:

• Select the cell into which the current date or time needs to be inserted.
• Enter the function NOW() or TODAY().
• Press the Enter key.
• The current date-time or date will be inserted into the selected cell.

3. Insert Timestamp Automatically While Entering Data In Different Column

This method will enable the insertion of the timestamp in a column while entering data into another column. For example, consider two columns A and B in your worksheet. While you enter data in a cell of column A, the current date and time in the corresponding cell in Column B will get updated automatically.

Follow the below steps to implement the same:

• Click File -> Options and the Excel Options dialogue box will appear. Now from the left pane, select the Formulas option. You will see Enable interactive calculation in the right pane below Calculation options. Check this option and select OK.

• In this next adjoining column (say column B), enter this formula: 

=IF(A1<>"",IF(B1<>"",B1,NOW()),"")

• Drag and select cells to auto-fill the formula.

• You can also customize the format of the date and time. To do this, right-click on the selected formula cells, go to the context menu, and select Format Cells. You will see the Format cells dialogue box. Go to the bottom and select Custom. In the right pane select the suitable format for your cells.

• Now when you enter the data in a column, you will get the date and time in your chosen format in the adjoining cell.

4. Using VBA To Insert Timestamp Automatically While Entering Data In a Different Column

If you are familiar with working on VBA, then there is another method for you to automatically insert the timestamp in your excel sheet using VBA.

Follow the below steps to implement the same:

• To open Microsoft Visual Basic for Applications, press Alt + F11. The VBA window will open. Now go to Insert and select the Module to open a blank module.

• Now, add the code given below to your blank module and save the code.

Function MyTimestamp(Reference As Range)

If Reference.Value <> "" Then

MyTimestamp = Format(Now, "dd-mm-yyyy hh:mm:ss")

Else

MyTimestamp = ""

End If

End Function

• Go back to your worksheet and type the below formula in your cell in which you want to insert timestamp.

A is the column for inserting entries of data.
B is corresponding column, into which the date and timestamp will be updated.

Type the below formula into B1 cell:
=MyTimestamp(A1)

• Now, if you insert the entry in a column, you will get the date and time in the adjoining cell automatically.

Unix timestamp is also called Epoch time or POSIX time which is wildly used in many operating systems or file formats. This tutorial is talking about the conversion between date and Unix timestamp in Excel.

Convert date to timestamp

Convert date and time to timestamp

Convert timestamp to date

More tutorials about datetime conversion…

Convert date to timestamp

To convert date to timestamp, a formula can work it out.

Select a blank cell, suppose Cell C2, and type this formula =(C2-DATE(1970,1,1))*86400 into it and press Enter key, if you need, you can apply a range with this formula by dragging the autofill handle. Now a range of date cells have been converted to Unix timestamps.

Convert date and time to timestamp

There is a formula that can help you convert date and time to Unix timestamp.

1. Firstly, you need to type the Coordinated Universal Time into a cell, 1/1/1970. See screenshot:

2. Then type this formula =(A1-$C$1)*86400 into a cell, press Enter key, then if you need, drag the autofill handle to a range with this formula. See screenshot:

Tips: In the formula, A1 is the date and time cell, C1 is the coordinate universal time you typed.

Convert timestamp to date

If you have a list of timestamp needed to convert to date, you can do as below steps:

1. In a blank cell next to your timestamp list and type this formula =(((A1/60)/60)/24)+DATE(1970,1,1), press Enter key, then drag the auto fill handle to a range you need.

2. Then right click the cells used the formula, and select Format Cells from the context menu, then in the popping Format Cells dialog, under Number tab, click Date in the Category list, then select the date type in the right section.

3. Click OK, now you can see the Unix timestamps have been converted to dates.

Notes:

1. A1 indicates the timestamp cell you need.

2. This formula also can use to convert timestamp series to date and time, just format the result to the date and time format.

3. The above formula converts 10-digits number to a standard datetime, if you want to convert 11-digits number, or 13-digits number, or 16-digits number to a standard datetime in Excel, please use formula as below:

Convert 11-digits number to date: =A1/864000+DATE(1970,1,1)

Convert 13-digits number to date: =A1/86400000+DATE(1970,1,1)

Convert 16-digits number to date: =A1/86400000000+DATE(1970,1,1)

For different lengths of number which needed to be converted to datetime, just change the number of zeros of the divisor in the formula to correctly get the result.

Relative Articles:

• How to convert date time from one time zone to another in Excel?
  This article will show you how to convert date time from one time zone to another in Excel.

• How to split date and time from a cell to two separated cells in Excel?
  For instance, you have a list of data mixed with date and time, and you want to split each of them into two cells, one is date and another is time as below screenshots shown. Now this article provides you two quick methods to solve it in Excel.

• How to convert date/time format cell to date only in Excel?
  If you want to convert date-time format cell to date value only such as 2016/4/7 1:01 AM to 2016/4/7, this article can help you.

• How to remove time from date in Excel?
  If there has a column of date with time stamp, such as 2/17/2012 12:23, and you don’t want to retain the time stamp and want to remove the time 12:23 from the date and only leave the date 2/17/2012. How could you quickly remove time from date in mulitple cells in Excel?

• How to combine date and time into one cell in Excel?
  There are two columns in a worksheet, one is the date, the other is time. Is there any way to quickly combine these two columns into one, and keep the time format? Now, This article introduces two ways in Excel to combine date column and time column into one and keep the time format.

A few years back when I was working for a tech company I was one of those people who were an Excel help point for all. And that’s the real reason I’m fascinated to learn more. One day the lady who was working as a reception coordinator came to me and asked:

Puneet, I’m managing a list of tasks and I want to add date and time in the corresponding cell on completion of each task. Which is the best way?

And quickly I realized that she was talking about a timestamp. I’m sure you also use it while working in Excel. In general, it contains the current date and time, and we use it to capture the completion time of a task. Now the thing is: Which is the best way to insert a timestamp in Excel?

In this post, you’ll learn how to create a timestamp in Excel using 5 different ways and we will try to figure out which is the best out of all. So let’s get started.

1. Using a Keyboard Shortcut to Insert a Timestamp

There are two different shortcuts to insert a date and a time. And, here we need to use both of them subsequently. Here are the steps:

1. First of all, select the cell where you need to insert a timestamp.
2. After that, use the shortcut key Control + : (Press and hold control and then press colon). Once you press this, it will insert the current date (according to your system) in the cell.
3. At this time, your cell is in edit mode.
4. Now, press Control + Shift + : (Press and hold the control and shift key and then press the colon).
5. Your cell is still in edit mode, now press the enter key to complete the entry.

In short, you need to press two shortcuts in sequence to insert this. And, if you want to add only one thing of date and time, just skip the shortcut key.

2. Insert a Timestamp with NOW Function

A simple dynamic method. If you want to use a formula to insert a timestamp, the perfect way is to use the NOW function. When you enter this function in a cell it returns the current date and time according to your system’s settings.

The default format of date and time return by NOW is mm/dd/yyyy hh:mm. But for some reason, if you want a custom format, you change its format using the custom format option. Select the cell ➜ Press shortcut key control + 1 ➜ Select “Custom” ➜ Enter “mm/dd/yyyy hh:mm” in the input box ➜ Click OK.

And if you want to enter the only date then you can use TODAY instead of NOW, it only returns the current date according to the system’s settings.

Pros

1. It’s a dynamic method.
2. You can use both of the functions with an IF function to create a condition to enter a timestamp if another cell has a value.

Cons

1. Even though it’s a dynamic method but as both of the functions are volatile they will get updated whenever you make changes to your worksheet.
2. And if you just want values instead of formulas you need to convert them into values manually.

3. Using Circular Reference for Creating a Timestamp

If you want to get into an advanced method and don’t want to use methods #1 and #2 then you can use a circular reference to insert a timestamp.

But before you learn this method let’s understand what circular reference is all about. Let’s say you have a value of 5 in cell A1 and a value of 10 in cell B1. Now if you enter a formula =A1+B1+C1 in cell C1, it will return a message circular reference error.

This is because you are using cell C1 as a reference in cell C1. When a circular reference error happens, there is a non-ending loop in the cell. Reference the cell A3 is dependent on the value of cell A3 and the value of A3 is dependent on reference to cell A3.

But when a circular reference is entered, Excel doesn’t calculate it and the non-ending loop never starts.

Here’s the deal:

You can enable the “iterative calculation option” to force Excel to perform the calculation at least one time and use the now function in the calculation. This way Excel will update the cell formula only one time instead of every time. Steps to enable iterative calculation option:

1. Go to File ➜ Options.
2. In the Excel options, select Formulas.
3. In the Calculated options, check the Enable iterative calculation option.
4. Click OK.

After that in cell B2, enter the below formula in the formula bar.

=IF(A2<>"",IF(B2<>"",B2,NOW()),"")

Now when you enter any value in cell A2 the formula in cell B2 will return a timestamp.

If you are a VBA freak then I’m sure you’ll find this VBA code useful. With this, you don’t need to enter a formula or even not use any shortcut key. Just select the cell where you need to enter a timestamp and run the macro.

Sub timeStamp()

Dim ts As Date

With Selection

.Value = Now
.NumberFormat = "m/d/yyyy h:mm:ss AM/PM"

End With

End Sub

How to use this code

To use this code you can add it on QAT (quick access toolbar) and run it every time whenever you need to add a timestamp.

Here are the steps:

Now you have an icon on QAT and whenever you need a timestamp you can select the cell and click this button to insert it.

4.1 Using UDF for Timestamp

Yes, you can also create a custom Excel function for inserting a timestamp in Excel. Below is the code for this UDF.

Function Timestamp(Reference As Range)
If Reference.Value <> "" Then
Timestamp = Format(Now, "dd-mm-yyyy hh:mm:ss")
Else
Timestamp = ""
End If
End Function 

By using this user-defined function you can get a timestamp in a cell if another has a value in it. Please follow the below steps:

• Go to Developer tab and open VBA editor.
• In VBA editor, insert a new module and paste this code into it.
• Now, close VBA editor and come back to your worksheet.
• In the cell B2, enter below formula.
  
• Now, when you enter any value in cell A1, cell B1 will get a timestamp.

Conclusion

Adding a timestamp is something we often do while working in Excel. And, you have 5 different methods to insert it. If you ask me I love to use the VBA button on QAT for this. The best way is to add this code in a personal.xlsb so that you can use it in all the workbooks. This is the whole story about timestamps and I’m sure you found it useful but now tell me one thing.

Do you know any other method for this?

Please share with me in the comment section, I’d love to hear from you, and please don’t forget to share this tip with your friends.

If you want to sharpen your existing Excel Skills, check out these Excel Tips and Tricks.

Временная метка Unix также называется временем эпохи или временем POSIX, которое широко используется во многих операционных системах или форматах файлов. В этом руководстве обсуждается преобразование даты в метку времени Unix в Excel.

Преобразовать дату в метку времени

Преобразование даты и времени в метку времени

Преобразовать метку времени на дату

 Преобразовать дату в метку времени

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Чтобы преобразовать дату в метку времени, вы можете использовать формулу для решения проблемы.

Выберите пустую ячейку и введите эту формулу = (A1-DATE (1970,1,1)) * 86400 Enter и нажмитевойтиKey, при необходимости, вы можете применить диапазон этой формулы, перетащив маркер автозаполнения. Теперь ряд ячеек даты преобразован в отметки времени Unix.

 Преобразование даты и времени в метку времени

Существует формула, которая поможет вам преобразовать дату и время в метку времени Unix.

1. Во-первых, вам нужно ввести всемирное координированное время в ячейку 01.01.1970. Смотрите скриншот:

2. Затем введите эту формулу = (A1- $ C $ 1) * 86400 в ячейку, нажмитеВойтиKey и при необходимости используйте эту формулу, чтобы перетащить дескриптор автозаполнения в диапазон. Смотрите скриншот:

подсказки: В формуле A1 — это ячейка даты и времени, а C1 — введенная вами координата мирового времени.

 Преобразовать метку времени на дату

Если у вас есть список меток времени, которые необходимо преобразовать в даты, вы можете выполнить следующие действия:

1. В пустой ячейке рядом со списком отметок времени введите эту формулу = (((A1 / 60) / 60) / 24) + ДАТА (1970,1,1), нажмитевойтиButton, а затем перетащите маркер автозаполнения в нужный диапазон.

2. Затем щелкните правой кнопкой мыши ячейку, в которой используется формула, и выберитеФормат ячейкиИз контекстного меню, а затем во всплывающемФормат ячейкиДиалоговое окно под NУмбраЯрлык, щелкнитеДатаВкатегорияСписок, а затем выберите тип даты справа.

3. НажмитеOK, Теперь вы можете видеть, что метка времени Unix была преобразована в дату.

незамедлительный:

1. A1 представляет нужную ячейку с отметкой времени.

2. Эту формулу также можно использовать для преобразования серии отметок времени в дату и время, просто отформатируйте результат в формате даты и времени.

Перепечатано:https://www.extendoffice.com/zh-CN/documents/excel/2473-excel-timestamp-to-date.html

Here is a mapping for reference, assuming UTC for spreadsheet systems like Microsoft Excel:

                         Unix  Excel Mac    Excel    Human Date  Human Time
Excel Epoch       -2209075200      -1462        0    1900/01/00* 00:00:00 (local)
Excel ≤ 2011 Mac† -2082758400          0     1462    1904/12/31  00:00:00 (local)
Unix Epoch                  0      24107    25569    1970/01/01  00:00:00 UTC
Example Below      1234567890      38395.6  39857.6  2009/02/13  23:31:30 UTC
Signed Int Max     2147483648      51886    50424    2038/01/19  03:14:08 UTC

One Second                  1       0.0000115740…             —  00:00:01
One Hour                 3600       0.0416666666…             ―  01:00:00
One Day                 86400          1        1             ―  24:00:00

_{*  “Jan Zero, 1900” is 1899/12/31; see the Bug section below. † Excel 2011 for Mac (and older) use the 1904 date system.}

As I often use awk to process CSV and space-delimited content, I developed a way to convert UNIX epoch to timezone/DST-appropriate Excel date format:

echo 1234567890 |awk '{ 
  # tries GNU date, tries BSD date on failure
  cmd = sprintf("date -d@%d +%%z 2>/dev/null || date -jf %%s %d +%%z", $1, $1)
  cmd |getline tz                                # read in time-specific offset
  hours = substr(tz, 2, 2) + substr(tz, 4) / 60  # hours + minutes (hi, India)
  if (tz ~ /^-/) hours *= -1                     # offset direction (east/west)
  excel = $1/86400 + hours/24 + 25569            # as days, plus offset
  printf "%.9fn", excel
}'

I used echo for this example, but you can pipe a file where the first column (for the first cell in .csv format, call it as awk -F,) is a UNIX epoch. Alter $1 to represent your desired column/cell number or use a variable instead.

This makes a system call to date. If you will reliably have the GNU version, you can remove the 2>/dev/null || date … +%%z and the second , $1. Given how common GNU is, I wouldn’t recommend assuming BSD’s version.

The getline reads the time zone offset outputted by date +%z into tz, which is then translated into hours. The format will be like -0700 (PDT) or +0530 (IST), so the first substring extracted is 07 or 05, the second is 00 or 30 (then divided by 60 to be expressed in hours), and the third use of tz sees whether our offset is negative and alters hours if needed.

The formula given in all of the other answers on this page is used to set excel, with the addition of the daylight-savings-aware time zone adjustment as hours/24.

If you’re on an older version of Excel for Mac, you’ll need to use 24107 in place of 25569 (see the mapping above).

To convert any arbitrary non-epoch time to Excel-friendly times with GNU date:

echo "last thursday" |awk '{ 
  cmd = sprintf("date -d "%s" +"%%s %%z"", $0)
  cmd |getline
  hours = substr($2, 2, 2) + substr($2, 4) / 60
  if ($2 ~ /^-/) hours *= -1
  excel = $1/86400 + hours/24 + 25569
  printf "%.9fn", excel
}'

This is basically the same code, but the date -d no longer has an @ to represent unix epoch (given how capable the string parser is, I’m actually surprised the @ is mandatory; what other date format has 9-10 digits?) and it’s now asked for two outputs: the epoch and the time zone offset. You could therefore use e.g. @1234567890 as an input.

Bug

Lotus 1-2-3 (the original spreadsheet software) intentionally treated 1900 as a leap year despite the fact that it was not (this reduced the codebase at a time when every byte counted). Microsoft Excel retained this bug for compatibility, skipping day 60 (the fictitious 1900/02/29), retaining Lotus 1-2-3’s mapping of day 59 to 1900/02/28. LibreOffice instead assigned day 60 to 1900/02/28 and pushed all previous days back one.

Any date before 1900/03/01 could be as much as a day off:

Day        Excel   LibreOffice
-1            -1    1899/12/29
 0    1900/01/00*   1899/12/30
 1    1900/01/01    1899/12/31
 2    1900/01/02    1900/01/01
 …
59    1900/02/28    1900/02/27
60    1900/02/29(!) 1900/02/28
61    1900/03/01    1900/03/01

Excel doesn’t acknowledge negative dates and has a special definition of the Zeroth of January (1899/12/31) for day zero. Internally, Excel does indeed handle negative dates (they’re just numbers after all), but it displays them as numbers since it doesn’t know how to display them as dates (nor can it convert older dates into negative numbers). Feb 29 1900, a day that never happened, is recognized by Excel but not LibreOffice.

13 Answers

1. From a timestamp in milliseconds (ex: 1488380243994) use this formula: =A1/1000/86400+25569. with this formater: yyyy-mm-dd hh:mm:ss.000.
2. From a timestamp in seconds (ex: 1488380243) use this formula: =A1/86400+25569. with this formater: yyyy-mm-dd hh:mm:ss.

How do I turn a timestamp into a date?

Let’s see the simple example to convert Timestamp to Date in java.

1. import java.sql.Timestamp;
2. import java.util.Date;
3. public class TimestampToDateExample1 {
4. public static void main(String args[]){
5. Timestamp ts=new Timestamp(System.currentTimeMillis());
6. Date date=new Date(ts.getTime());
7. System.out.println(date);
8. }

How do I convert a timestamp to a date in sheets?

1 Answer. You can extract the date portion of the timestamp using MID() then use DATEVALUE() to convert it to date format. Then use Format > Number > Date command.

How do I convert time to epoch?

The Unix epoch is the time 00:00:00 UTC on 1 January 1970. UNIX epoch time can be converted into local time by dividing it by 86400 and adding result to epoch date in days.

What is the format of timestamp?

The default format of the timestamp contained in the string is yyyy-mm-dd hh:mm:ss. However, you can specify an optional format string defining the data format of the string field.

What is the Datevalue function in Excel?

Description. The DATEVALUE function is helpful in cases where a worksheet contains dates in a text format that you want to filter, sort, or format as dates, or use in date calculations. To view a date serial number as a date, you must apply a date format to the cell.

PostgreSQL – How to extract date from a timestamp?

1. SELECT DATE(column_name) FROM table_name;
2. SELECT ‘2018-07-25 10:30:30’::TIMESTAMP::DATE;
3. SELECT DATE(SUBSTRING(‘2018-07-25 10:30:30’ FROM 1 FOR 10));

How do I manually convert a timestamp to a date?

In this article, we will show you how to convert UNIX timestamp to date.
Convert Timestamp to Date.

How do I convert a timestamp to a date in SQL?

We can convert the timestamp to date time with the help of FROM_UNIXTIME() function. Let us see an example. First, we will create a table with column of int type. Then we convert it to timestamp and again into date time.

What is epoch date?

In a computing context, an epoch is the date and time relative to which a computer’s clock and timestamp values are determined. The epoch traditionally corresponds to 0 hours, 0 minutes, and 0 seconds (00:00:00) Coordinated Universal Time (UTC) on a specific date, which varies from system to system.

How do I format a timestamp in Excel?

Insert Date and Timestamp Using NOW Function

1. Right-click on the cell and select ‘Format cells’.
2. In the Format Cells dialog box, select ‘Custom’ category in the Number tab.
3. In the Type field, enter dd-mm-yyyy hh:mm:ss.
4. Click OK.

How do I change the format of the date in Excel?

Follow these steps:

1. Select the cells you want to format.
2. Press Control+1 or Command+1.
3. In the Format Cells box, click the Number tab.
4. In the Category list, click Date.
5. Under Type, pick a date format.

How do you format a timestamp?

The timestamp is parsed either using the default timestamp parsing settings, or a custom format that you specify, including the time zone.
Automated Timestamp Parsing.

How do I convert Datevalue to date?

The DATEVALUE function in Excel converts a date in the text format to a serial number that Excel recognizes as a date. So, the formula to convert a text value to date is as simple as =DATEVALUE(A1) , where A1 is a cell with a date stored as a text string.

Extract date from a date and time

1. Generic formula. =INT(date)
2. To extract the date part of a date that contains time (i.e. a datetime), you can use the INT function.
3. Excel handles dates and time using a scheme in which dates are serial numbers and times are fractional values.
4. Extract time from a date and time.

How do I convert 8 digits to dates in Excel?

To do this, select a cell or a range of cells with the numbers you want to convert to dates and press Ctrl + 1 to open the Format Cells dialog box. On the Number tab, choose Date, select the desired date format in Type and click OK. If have any issues I will be here to help you. Thanks!

How do I convert a timestamp to a MONTH in Excel?

MONTH function in Excel – get month number from date.
This is the most obvious and easiest way to convert date to month in Excel. For example: =MONTH(A2) – returns the month of a date in cell A2. =MONTH(DATE(2015,4,15)) – returns 4 corresponding to April.

Extract the day number
The getting day number formula is as simple as the formulas above. Please do as follows. Copy and paste formula =DAY(A2) into a blank cell D2 and press Enter key. Then drag the Fill Handle down to the range to extract all day numbers from the referenced date list.

What is Eomonth formula in Excel?

Description. The Microsoft Excel EOMONTH function calculates the last day of the month after adding a specified number of months to a date. The result is returned as a serial date. The EOMONTH function is a built-in function in Excel that is categorized as a Date/Time Function.

To convert time to a number of hours, multiply the time by 24, which is the number of hours in a day. To convert time to minutes, multiply the time by 1440, which is the number of minutes in a day (24*60). To convert time to seconds, multiply the time time by 86400, which is the number of seconds in a day (24*60*60 ).

How do I convert UTC timestamp to local time in Excel?

Convert UTC/GMT time to local time with formulas
(2) The formula =A2 + (9 / 24) will return a decimal number. For converting the decimal number to time, please select the decimal number, and click Home > Number Format > Time.