+**622** was a common year in the Julian calendar, forever marked by the [Hijra](/wiki/Hijra). This pivotal migration of Prophet Muhammad from Mecca to Medina laid the foundation for the [Islamic calendar](/wiki/Islamic_calendar) and the expansion of Islam.
+## See also
+- [Muhammad](/wiki/Muhammad)
+- [Mecca](/wiki/Mecca)
+- [Medina](/wiki/Medina)
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