“…all situations where people have to work at times which are usually reserved for family or rest: working very early in the morning (before 8 a.m.), late in the evening (after 6 p.m.), during the night, on Saturdays and/or on Sundays” (Le Bihan & Martin, 2004, pp. 566 – 567).

Le Bihan, B., & Martin, C. (2004, December). Atypical working hours: Consequences for childcare arrangements. Social Policy and Administration, 38(6), 565 - 590.