There is an algorithm for computing the date on which Easter falls for a particular year.
The algorithm would be appropriate for Algebra I students because it uses variables and
formulas.
Below are three links to aid in finding the date of Easter.
The first link is a worksheet to determine the date of Easter if you know the year.
You must do all the calculations!
The second link is an interactive program in which you are prompted for the year,
and then the computer figures out the month and day.
The third link is an interactive program in which you enter a target date for Easter
and an interval of years. Then the computer determines the years within the interval
where Easter falls on that date.