The goal of this gem is to parse a crontab timing specification and determine when the job should be run. It is not a scheduler, it does not run the jobs.
cron_parser = CronParser.new('30 * * * *')
# Comming times
next_comming_time = cron_parser.next(Time.now)
# Times that have been
most_resently_time = cron_parser.last(Time.now)