Note that conversion functions (and any other functions that require a specific type of input, such as a date or time value) depend on the current formats specified in the flow properties.

For example, if you have a field named DATE that's stored as a string with values Jan 2021, Feb 2021, and so on, you could convert it to date storage as follows:

to_date(DATE)

For this conversion to work, select the matching date format MON YYYY as the default date format for the flow.

Dates stored as numbers. Note that DATE in the previous example is the name of a field, while to_date is a CLEM function. If you have dates stored as numbers, you can convert them using the datetime_date function, where the number is interpreted as a number of seconds since the base date (or epoch).

datetime_date(DATE)

By converting a date to a number of seconds (and back), you can perform calculations such as computing the current date plus or minus a fixed number of days. For example:

datetime_date((date_in_days(DATE)-7)*60*60*24)