It tends to be 'Fr' or 'Fri'. Both are used.
Friday is the correct spelling.
fri
With a capital F, Friday.
The spelling is Saturday (Saturn's Day).
Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday
Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday.
Friday. the f stands for friday the full meaning is Thank God ( or goodness) Its Friday
With a capital F, Friday.
Vendredi is the French word for "Friday".
In Maori, "Friday" is spelled as RΔmere.
viernes
Freitag
The fifth day of the week is Friday.
Pōʻalima [po'ah-lee-ma]
The day name is sexta-feira. ("sixth day")
joyeux Vendredi saint
The spelling is Saturday (Saturn's Day).
Depending on the part of the world you are in, Friday and Saturday or Saturday and Sunday.
Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday