wk
written abbreviationforweek
星期，周（week的缩写）Specific periods of time
- Anthropocene
- around-the-clock
- British Summer Time
- BST
- calendar month
- Cretaceous
- hour-long
- hr
- Jurassic
- lunar month
- Mesozoic
- nightlong
- Oligocene
- Ordovician
- Palaeocene
- Palaeogene
- Precambrian
- week-long
- year
- year-long