How do I Trigger an event on a date or period?

Want to show christmas stuff :-)

R/fleeming

The easiest way is to compare unixtime expression.

For example unixtime>1576800000000 and unixtime<1578096000000

unixtimestamp.com/index.php

Note, that in C3 unixtime is in milliseconds, so you need to add 3 zeroes at the end.