on 08-18-2021 01:18 PM - edited on 09-14-2023 10:55 AM by JackLacava
Assuming that the date being shown is always the last day of the month and the client is using calendar months, it is possible to use XFBR string rule to call a function to get the number of days in the month.
Source: Office Hours 2020-01-17 Partner Enablement