Mid-Sha'ban is a Muslim holiday observed by Shia and Sunni Muslim communities on the eve of 15th of Sha'ban — the same night as Shab-e-barat or Laylat al-Bara’ah.

There are two official holidays in Islam that are celebrated by Muslims worldwide: Eid al-Fitr and Eid al-Adha. The timing of both holidays are set by the lunar Islamic calendar, which is based upon the cycle of the moon, and so is different from the more common, European, solar-based Gregorian calendar. Every year, the Gregorian dates of the Islamic holidays change.