| 1. | (in England, Ireland, and Wales) one of the four days, Lady Day, Midsummer Day, Michaelmas, or Christmas, regarded as marking off the quarters of the year, on which quarterly payments are due, tenancies begin and end, etc. |
| 2. | (in Scotland) one of the four days, Candlemas, Whitsunday, Lammas, or Martinmas, regarded as marking off the quarters of the year. |
| quarter day n. Any of the four days of the year regarded as the beginning of a new season or quarter, when most quarterly payments are due. |