Whitmonday vs. Whitsunday

Whitmondaynoun

The day following Whitsunday; - called also Whitsun Monday.

Whitsundaynoun

The seventh Sunday, and the fiftieth day, after Easter; a festival of the church in commemoration of the descent of the Holy Spirit on the day of Pentecost; Pentecost; - so called, it is said, because, in the primitive church, those who had been newly baptized appeared at church between Easter and Pentecost in white garments.

Whitmondaynoun

the day after Whitsunday; a legal holiday in England and Wales and Ireland

Whitsundaynoun

See the Note under Term, n., 12.

Whitsundaynoun

seventh Sunday after Easter; commemorates the emanation of the Holy Spirit to the apostles; a quarter day in Scotland