This was in practice at some time between midday and 3.00 p.m.The evening meal had to be a reasonable time after this, at or after vespers (around sunset).According to the Old English Rule of Chodegang, if preostas ate twice a day then it was a midday and evening, and at Aethelwold's monastery the monks had dinner and supper...An ealier meal than dinner or supper is referred to--the undernswoesendum. In contrast to the monastic regimen where the main meal was at or around midday, it is possible that in a secular time-table, main meals were at the third hour and again at supper time, to allow a full day's activity between them.
For a long time luncheon was a very upper-class habit; ordinarily working people dined in the early evening, and contented themselves as they had done for centuries with a mid-day snack...
The time was only specified as a 'convenyent hower', although to break one's fast after devotions was the generally recommended procedure.
Earlier reference to breakfast sometimes meant dinner, literally, in these cases, the first meal of the day.
These meals consisted of breakfast at a very early hour to allow for dinner at about 9 a.m., or not later than 10.00 a.m., and supper probably before it got dark, perhas at 3.00 p.m. The times and number of meals were originally derived from the hours of devotions of the Church.
Monks ate the main meal of their day after the celebration of nones, which was nine hours after daybreak.