ZoTime.get_tzone(items.last)
ZoTime.get_tzone(:current)

t = ZoTime.new(time.to_f, @timezone)
zt = ZoTime.new(from.to_i + 1, @timezone)

ZoTime.now

stderr.puts("#{pre} local_tzone: #{Rufus::Scheduler::ZoTime.local_tzone.inspect}")

@first_at = ZoTime.make(first)
@last_at = last ? ZoTime.make(last) : nil
return Rufus::Scheduler::ZoTime.make(o) if o.is_a?(Time)