(US, marketing) The Monday after Thanksgiving, regarded as a day when many people shop online.

The traditional start of the English agricultural year, generally the first Monday after Epiphany.

Synonym of Clean Monday, in Cyprus, the seventh Monday before Easter, used as the beginning of Lent in Greek Orthodoxy.

(US, marketing) The Monday before Christmas, used as a shopping event to order last-minute gifts for shipping before Christmas Day.

Alternative form of Plough Monday

The first Monday of the new year, when presents were traditionally given to servants and children.

(Christianity) The seventh Monday before Easter, (Eastern Christianity) traditionally regarded as the beginning of Lent

plural of Cyber Monday

(humorous) A fictitious disorder associated with the tiredness, irritability or distractedness that comes from returning to work after the weekend.

Any of certain Mondays when undesirable or turbulent events have occurred.