after_hours
1. [ adverb ] not during regular hours
Examples:

"he often worked after hours"

Similar spelling:   after-hours
  aftermost
  afterworld
  afterbirth
  after_part
  aftershaft
  afterthought
  after-school
  afterwards
  afterward
  aftershafted
  afternoon
  aftermath
  afterglow
  aftercare
  afterburner
  after_all