For example , on the second day of the week , the Brits celebrated the God `` Tyr '' ( Tyrsday ) ; on the third day of the week , they celebrated the God Odin , known in Saxon as `` Wodin '' ( Wodinsday ) ; on the fourth day of the week , they celebrated Thor ( Thorsday ) and on the fifth day of the week celebrated Frigg ( Friggsday ) .