Number of working hours between 2 times

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Cell "A1" displays the current date. Custom format "dddd dd mmmm yyyy".
Cell "A2" displays the current date and time. Custom format "dddd dd mmmm yyyy hh:mm:ss".

	A
1	=TODAY() = Sunday 01 May 2022
2	=NOW() = Sunday 01 May 2022 18:37:54

Built-in Functions

DATE - The date as a date serial number given a year, month, day.
NOW - The serial number of the current system date and time.