We emulate most of the date and time operations available in Excel. For example, to add 7 days to a date, just add the number 7, e.g.

See you next week on the @(date.today + 7)

To rewind a date by a certain number of days, just subtract that number, e.g.

Yesterday was @(date.today - 1)

To add or subtract months, use the EDATE function, e.g.

Next month's meeting will be on @(EDATE(date.today, 1))

To create a datetime from a known datetime and a separate hour, e.g.

Your next appointment is  @(DATE(YEAR(contact.created_on), MONTH(contact.created_on), DAY(contact.created_on)) + TIMEVALUE("15:00"))

To change the time of datetime value, add or subtract the result of the TIME function, e.g.

2 hours and 30 minutes from now is @(date.now + TIME(2, 30, 0))
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