Return the first Monday of the current month

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Cell "A1" displays a date.
All these cells have been formatted with the custom number format "dd dddd mmmm yyyy".

	A
1	=TODAY() = Tuesday 28 March 2023
2	=NOW() = Tuesday 28 March 2023 19:16:28
3	=DATE(YEAR(A1),MONTH(A1),7)-WEEKDAY(DATE(YEAR(A1),MONTH(A1),7),3) = 06 Monday March 2023

Built-in Functions

TODAY - The date serial number representing today's date.
DATE - The date as a date serial number given a year, month, day.
DAY - The day as an integer given a date serial number.
MONTH - The month as an integer given a date serial number.
WEEKDAY - The day of the week for a given date.
YEAR - The year as an integer given a date serial number.

Related Formulas

Return the first Monday of the next month
Return the first Monday of the previous month