Do the following guides even display the operating days of 405
in the first place?

They display operating on Good Friday, 2 wks bef Ching Ming/on
Ching Ming/2 wks aft Ching Ming, on 1st Ramadan, on Hari Raya
Puasa, 1 wk bef Deepavali/on Deepavali, on All Souls' Day n on Hari
Raya Haji below Service 405 route details