Allah, the Exalted and Glorious, created the clay on Saturday and He created the mountains on Sunday and He created the trees on Monday and He created the things entailing labour on Tuesday and created light on Wednesday and He caused the animals to spread on Thursday and created Adam (peace be upon him) after 'Asr on Friday; the last creation at the last hour of the hours of Friday, i. e. between afternoon and night. This hadith is narrated through another chain of transmitters. [Muslim 2789]
Day/Night/Hour are concepts which we use in the context of earth rotation around the sun! When earth is facing the sun during rotation, it is day and when it is not, it is night! We are dependant on the earth rotation for day/night/hour.
I know there is a Quranic verse which says 50,000 days of Humans is like 1 day according to God but the day mean "period" and it has got nothing to do with "day/night of Humans". The Hadith specifically mentions day names such as "Monday", "Tuesday" and concepts like "hours".
I was wondering, how can the concept of day-time/night-time & days like "Monday", "Tuesday", "Wednesday", etc can be applied to God?