This article provides a comprehensive guide on using all the built-in date functions available in Decision Model and Notation (DMN). These functions are essential for modelling business decisions using DMN when you need to handle dates.
DMN Date Functions Reference
| Function | Parameters | Example | Result | Purpose |
|---|---|---|---|---|
| now () | now() | “2025-06-19T10:13:32.131429007+10:00” | Returns the DMNDateTime object which includes date,day, time offset, timezone and time(including seconds). | |
| today() | today() | “2024-05-22” | Returns the DMNDate object which includes today’s date and day. | |
| day of week (date) | date (Mandatory): Could be a date or date and time. | day of week( date(2019, 9, 17)) | “Tuesday” | Returns the day of the week according to the Gregorian calendar enumeration |
| month of year (date) | date (Mandatory): Could be a date or date and time. | month of year( date(2019,9,17) ) | “September” | Returns the month of the year according to the Gregorian calendar enumeration |
| week of year (date) | date (Mandatory): Could be a date or date and time. | week of year( date(2019, 9,17) ) | 38 | Returns the Gregorian number of the week within the year |
| day of year (date) | date (Mandatory): Could be a date or date and time. | day of year( date(2019,9,17) ) | 260 | Returns the Gregorian number of the day within the year |
