Days of the week

Sunday – Sun.
Monday – Mon.
Thursday - Th., Thu., Thur., or Thurs.
Wednesday - Wed
Tuesday - Tu., Tue., or Tues.
Friday – Fri.
Saturday – Sat.

Saturday is the last day of the week.
Thur is the abbreviation of Thursday.
Mother's day is always on Sundays.
The day immediately before Thursday is Wednesday.
The day immediately after Monday is Thursday.
Saturday is the day between Friday and Sunday.