March 25 (Lady Day), June 24 (Midsummer Day), September 29 (Michaelmas Day), and December 25 (Christmas Day).

Or better: Wchich do you know?

Quarter Days in Scotland:

Zitat

---

The "Old Scottish term days" corresponded approximately to the old Celtic quarter days:

Candlemas (2 February)
Whitsunday (legislatively fixed for this purpose as 15 May)
Lammas (1 August)
Martinmas (11 November).
These were also the dates of the Quarter Days observed in northern England until the 18th century.[citation needed]

The dates for removals and for the employment of servants of Whitsunday and Martinmas were changed in 1886 to 28 May and 28 November respectively.[5] The Term and Quarter Days (Scotland) Act 1990 redefined the "Scottish term days", in official use, as

28 February,
28 May,
28 August and
28 November
respectively.[6] The Act specifies that the new dates take effect on 13 June 1991 (12 months from the date it was passed). Thus the Scottish term days, as days on which rents are paid, correspond more closely to the cross-quarter days than to the English quarter days.

---

https://en.wikipedia.org/wiki/Quarter_days