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Use case

Create a calculated number field that displays the elapsed time in months since a date selected in a Date Picker field.


Create a new Calculated Number Field (by JWT) custom field and name it properly.

Providing a description will help you to identify what the custom field does but this step is optional.

Parser expression

Add the following parser expression:

{issue.cfaaaaa} != null ? ((year({system.currentDateTime}, LOCAL) - year({issue.cfaaaaa}, LOCAL))*12 + month({system.currentDateTime}, LOCAL) - (month({issue.cfaaaaa}, LOCAL))) : null
Do not forget to replace {issue.cfaaaaa} with the field codes of your Date Picker field.

Display format

Content type

Choose Duration

Duration display format

The display format is Number with the following custom format.

## month(s)

If you still have questions, feel free to refer to our support team.