The key thing here is that the Jewish religious (Hebrew) calendar is lunar based and hasn’t changed since 1178 CE, where as the Gregorian calendar (the one you most likely use) went into effect in 1582 and is solar based.
So while the two holidays are linked in the way you mention the date of them differs and from the perspective of the Gregorian calendar Passover “wanders”. The same thing happens with the Islamic calendar.
There is a ton more to be said on the topic, but thats the TL:DR simplified version.
* [Hebrew calendar – wikipedia](https://en.wikipedia.org/wiki/Hebrew_calendar)
* [Gregorian calendar – wikipedia](https://en.wikipedia.org/wiki/Gregorian_calendar)
Latest Answers