2.124 FAQ-1107 How to merge separate date and time columns into one column?

merge-date-time

Last Update: 10/21/2024

You may encounter a situation where your date and time data are broken out into separate columns (e.g. Year, Month, Day, Hour, Minute) and you need to combine the components into a single date-time value (single column).

A Basic Example

First, let's start with a simple example. In this case, Column A contains dates and Column B contains times. Both columns have been set to the appropriate format in the Column Properties dialog. Create Column C and set its format to Date. Using the Set Column Values dialog (Ctrl + Q), enter the formula:

A+B

(Note that if the output displays as Julian Dates then Column C's format has not been properly set to Date.)

You can use Origin's Date( ) and Time() functions to get a Julian-date value to the Set Values.

An Advanced Example

In this example, either of the following expressions will work in your F(x)/Set Values formula (there may be others):

//concatenate the 1st 5 columns as string and specify what date format the string is. 
//It will return julian date
date(A$+"/"+B$+"/"+C$+" "+D$+":"+E$, "yyyy/M/dd HH:mm") 

//date(year, month, day) returns integer part of julian date, 
//time(hour, minute, second) returns fraction part of julian date. 
//So they should be added together to get complete julian date
date(A,B,C)+time(D,E,0)

Note that in the second example the "0" in time(D,E,0) is needed because there is no "seconds" column. Had there been such a column, the example might have read time(D,E,F).