Rarely. It is frequently the date of their entry into Heaven (date of death) but it can be any date.
There is no canonized saint by that name. However, there are several saints named Maurontus.
There are a number of saints named Francis. Please be specific. However, ALL canonized saints are given a feast day when tye are beatified. On any given day of the year 15-20 or more individuals are recognized.
The first of November is All Saints Day in which the church celebrates all the saints who have not been canonized but are in heaven. The second day of November is All Souls Day on which we pray for all departed souls in purgatory.
Oscar Romero has not yet been canonized or beatified so has no official feast day.
All saints and blesseds are assigned a feast day by the Vatican's Sacred Congregation for the Causes of Saints.
Absalom Jones is not a canonized saint
Florence Nightingale is not a canonized saint.
The feast of Saints Peter and Paul - June 29.
Florence Nightingale is not a canonized saint.
She has been declared as venerable but is not yet a canonized saint. Therefore, she has not been assigned a feast day. If and when she is beatified she will be given a feast day.
The feast of All Saints is celebrated on November 1st. It is a day for Christians to honor and remember all the saints in heaven, both known and unknown.
Everyday there are dozens of saints that are memorialized. However, if that feast falls on a Sunday or another important feast day, or Good Friday, the saint's day is not observed.