Holiday
A holiday was a day (or date) that commemorated a religious event or occasion of a historical occurrence. In many cases, they were commemorated with a festival.

As part of his role as 's morale officer, Neelix made a point of studying up on Vulcan holidays. He explained this to Tuvok in 2372 after declaring all Vulcan holidays to be the same. ()

Later that year, Seska chided Michael Jonas for his incompetence in performing their treasonous activities, asking him if he thought their continued communications were for the purpose of exchanging holiday greetings. ()

Holidays

By planet

Bajor 
 Bajoran Time of Cleansing
 Gratitude Festival (Peldor Festival)
 Ha'mara

Earth 
 Ancestors' Eve
 April Fools' Day
 Christmas
 First Contact Day
 Federation Day
 Halloween
 Hindu Festival of Lights
 Mazurka Festival
 New Year's Day
 Sadie Hawkins Dance
 Saint Patrick's Day
 Thanksgiving

Qo'noS 
 Day of Honor
 Kot'baval Festival

Kal Rekk
 Rumarie
 Tal-Shanar

Other 
 Batarael (Haliian homeworld)
 Captain Picard Day ()
 Captain Picard Day ()
 Commander Riker Day (USS Enterprise-D)
  (Beta III)
 Red hour
 First meal (Meridian)
 Lohlunat (Risa)
 Mother's Day (Lissepia)
 Prixin (Talax)
 Ktarian music festival

Personal holidays 
 Anniversary
 Birthday
 I'm Married to the Most Wonderful Woman in the Galaxy Day (according to Miles O'Brien)
 Naming Day (Ferenginar)

External link 
 

Events
nl:Feestdagen en vieringen