Assertion: calendar's month | /r/MadeOf | 28 days
Facets:
value: in common years
type: TEMPORAL
Source sentences:
text: It is common to display the Gregorian calendar in separate monthly grids of seven columns (from Monday to Sunday, or Sunday to Saturday depending on which day is considered to start the week – this varies according to country) and five to six rows (or rarely, four rows when the month of February contains 28 days in common years beginning on the first day of the week), with the day of the month numbered in each cell, beginning with 1.