@rende11 @danvingo yes t/inst is fn to get platform date. for the interval calc, tick can do this with fns in the interval ns. still alpha.

(require '[tick.alpha.interval :as t.i])

(t.i/contains? (t.i/new-interval (t/date "2020-01-01") (t/date "2022-01-01")) (t/date "2021-01-01"))