No 1 May is not Sister Day but it is Workers Day.
Sister day is on 1 August on Sunday
Sister Sister - 1994 The Birthday 1-8 was released on: USA: 20 May 1994
The fourth season of 'Sister Wives" premiers on Mother's day, May 13, 2012.
May 1
May 30th, 2008
May Day is observed annually on May 1.
May 1 May 1 also is recognized in the U.S. as Law Day
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Justin Bieber's half-sister, Jazmyn Kathleen Bieber was born May 30, 2008. She is his only sister.
May Day, May 1 2009, was on a Friday.
The first Sunday of the month August is Sister's Day. There is no "Best Sister in the World Day."
May day is an European festival held on May 1. Many parades are held on that day.