A formula function that takes in a date/time and returns the number of seconds since 1 January 1970 00:00:00 UT.
For this to be useful the DATE() function would need to be modified to accept timestamp objects and parse as dates, or another function for converting timestamps to dates would need to be added.
This function would simplify some date processing tasks that are difficult in SmartSuite at the moment (such as finding the true difference between two dates in months) and would bring SmartSuite's capabilities in line with the more general processing of dates available in most programming languages