Passover in 1963 started on Tuesday, April 9th. In Israel, Passover is seven days, Outside of Israel, it is eight days.
Passover Traditions of Freedom - 1994 was released on: USA: 1994 (limited)
If not processed with flour or starches, usually this is not a problem. To be sure, look for packaged dates with a kosher for passover symbol on the label, or consult a competent local orthodox rabbi.
The dates of Passover (or Pesach, as we Jews call it) doesn't need to be calculated like the dates of Easter because it always begins on the same day on the Hebrew calendar - 14 Nisan.
Shari's Passover Surprise - 1996 TV was released on: USA: April 1996
Passover - 2007 was released on: USA: 3 August 2007 (North Shore Short Film Festival)
Passover begins on Saturday evening, April 19, with the first Seder. The last day of Passover in Israel is Saturday April 26, and outside of Israel is Sunday, April 27. It is unusual for Passover to begin immediately following Shabbat.
April 10 - April 18 in 1493.
How Much - 1963 was released on: USA: 1963
Image - 1963 was released on: USA: 1963
Rugrats - 1991 Passover 3-26 was released on: USA: 29 May 1994
Lonnie - 1963 was released on: USA: December 1963
Preparing for Passover can happen ANY day of the week. You go to the Hebrew Calendar to check for the dates. If Passover falls on Friday, make sure you're ready BEFORE Shabbat at sundown.