Hi Nma,

On Sundays of Lent we pray the Sorrowful mysteries.
On Sundays of Advent and Christmas we pray the Joyful mysteries.
On Sundays of Easter we pray the Glorious mysteries.

On Mondays year-round we pray the Joyful mysteries
On Tuesdays year-round we pray the Sorrowful mysteries
On Wednesdays year-round we pray the Glorious mysteries
On Thursdays year-round we pray the Luminous mysteries
On Fridays year-round we pray the Sorrowful mysteries
On Saturdays year-round we pray the Joyful mysteries

This is the Church's public pattern. Personally, you can say any set of Mysteries you wish, seeing this is a private devotion and not part of any doctrine of the faith.

On special feast days of joy, sadness or glory, I will personally substitute the Church's pattern for whatever the set of mysteries is in accordance with the type of feast day it is. e.g. a joyful feast day, a sorrowful feast day or glorious feast day, OR

Pray an extra set of mysteries for the spirit (joy, sorrow, glory) of that feast day.

Hope this answers your question.

Mike