java-time

(:require '[java-time :as jt])

(jt/zoned-date-time "2022-05-26T10:48:10+09:00")
;;=> #object[java.time.ZonedDateTime 0x11446251 "2022-05-26T10:48:10+09:00"]

(->> (jt/local-date-time)
     (jt/format "YYYY-MM-dd"))

(defn str->timestamp [datetime]
  (-> (jt/zoned-date-time datetime)
      jt/to-millis-from-epoch))

(defn days->seconds [days]
  (-> (jt/duration days :days)
      (jt/as :seconds)))
 
(defn now->plus-seconds [seconds]
  (-> (jt/zoned-date-time)
      (jt/plus (jt/seconds seconds))
      jt/to-millis-from-epoch))