This is an alternative form of week where the meaning is crammed in a single character.Essentially, this symbol means cycle (among other things) so it makes sense to also use it for week.If you squint, this looks like a completed check box. As this also means complete that could help.Also:
- circle
- to circle
- circumference
- lap
- cycle
- complete
- all
- all over
- thorough
- to help financially