The Sussex marbles season is of about 45 days in length and in the last century was very closely defined between Ash Wednesday and 12 noon on Good Friday, so much so that Good Friday (and in some places Ash Wednesday) were known as ‘Marbles Day’.

* Note on the date for Easter (Sunday).

The date of Easter is the first Sunday after the first full moon after March 21st (Spring Solstice). So the earliest day possible for a Good Friday is March 20th and the latest is April 23rd.