Public holidays in Pakistan are celebrated according to Islamic or Gregorian calendars for religious and civil purposes, respectively. Religious festivals like Eid are celebrated according to the Islamic calendar whereas other national holidays like international labour day, Pakistan day, and Quaid-i-Azam Day are celebrated according to the Gregorian calendar.
Partial holidays or national days
In addition to the holidays now no longer national holidays, several commemorations are observed as national days without a holiday:
References
Public holidays in Pakistan Wikipedia(Text) CC BY-SA