Use a relative date range in the cohort definition rather than fixed dates.
In the Cohort Builder, define your condition with a time window like:
“Users who did <event> more than 10 times in the last 7 days”
“Users who did <event> for the first time in the last 30 days”
These “last X days/weeks/months” style filters are evaluated at query time, so the cohort is recomputed based on “as of right now” every time it’s used, not on a fixed calendar range. [Cohorts; How cohorts are computed]
Because cohorts are always computed dynamically when you run a report, any relative time filter you use (e.g. “last 30 days”) will automatically adjust to the current day. [How cohorts are computed]
