Quadragesima Sunday

Between February 8 and March 14; first Sunday in Lent in WestThe name for the first Sunday in Lent is derived from the Latin word meaning "fortieth." The first Sunday of the Lenten season is 40 days before Easter. The other "numbered" Sundays, all before Lent, are Quinquagesima ("fiftieth"), Sexagesima ("sixtieth"), and Septuagesima ("seventieth"). These are reckoned by an approximate number of days before Easter; only Quadrigesima is close to the actual count. These names, as well as "Pre-Lent," are no longer used, the calendar now referring to the number of Sundays after Epiphany, e.g. first Sunday after Epiphany, second Sunday after Epiphany, and so on until Ash Wednesday, then, first Sunday in Lent.
SOURCES:
DictDays-1988, p. 93
EncyEaster-2002, pp. 19, 349, 350
FestWestEur-1958, p. 8
OxYear-1999, pp. 42, 43, 602, 605, 612
RelHolCal-2004, p. 92
SaintFestCh-1904, p. 97