[Mon.day] n [ME, fr. OE monandaeg; akin to OHG manatag Monday; akin to OE mona moon and to OE daeg day] (bef. 12c): the second day of the week -- Mon.days adv
MONDAY
Meaning of MONDAY in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012