Some countries recognize Saturday working hours while other countries only work from Monday to Friday.
In most countries, weekends fall on Saturday and Sunday, and because of that, they do not classify Saturday as working hours.
That notwithstanding, some banks have Saturday hours for almost all their branches, whereas other banks consider Saturday banking hours for selected branches.
Most countries like China, Canada, Dubai, UK, USA, Singapore, Japan, Russia, Germany, Qatar, etc. all have different considerations for Saturday as a working day.
See also: Wells Fargo Saturday Banking Hours.