Whitsun ale noun

A festival formerly held at Whitsuntide

Whitˈsunday noun

1. The seventh Sunday after Easter, commemorating the day of Pentecost, when the converts in the primitive Church wore white robes
2. In Scotland, one of the term days (now fixed as 28 May) on which rents, annuities, etc are payable

Whitˈsuntide noun

The season of Pentecost, comprising Whitsun week or Whit week, the week beginning with Whitsunday