Holidays Showing Possession :
A number of American Holidays have possessive forms, and are peculiarly inconsistent.
Mother's Day and
Father's Day are easy enough, one parent at a time, and
Parents' Day is nicely pluraiized, as is
Presidents' Day which celebrates the birthdays of both Washington and Lincoln.
All Souls' Day (Halloween), of course, takes a plural possessive.
Veterans Day is plural but not possessive, for historical reasons shrouded in mystery.
Martin Luther King Jr. Day has no possessive.
New Year's Day,
St. Valentine's Day,
St. Patrick's Day, and
April Fool's Day all have their singular prossessive form, and so, while we're at it, does
Season's Greetings.
Note that
Daylight Saving Time is neither possessive nor plural.
Related Links :
Possessives with Gerunds
Possessives versus Adjectival Labels
Possessives of Plurals
Irregular Plurals
Holidays Showing Possession
Compound Possessives
Possessives Constructions
Compound Constructions
Possessives with Appositive Forms
Double Possessives