Home First Weekday First Monday in September 2023

First Monday in September 2023

Answer: 2023-09-04 (Monday)

We scan the month from day 1 forward until the weekday matches Monday. The first match is the “first Monday” of the month.

Month starts on: Friday Offset: 3 day(s) after day 1 Month length: 30 days
Quick rule: Starting from 2023-09-01, move forward 3 day(s) to reach the first Monday → 2023-09-04.

Quick Answer

What is the first Monday in September 2023?

These lines all describe the same result:

First Monday in September 2023 = 2023-09-04
The first Monday of September 2023 is 2023-09-04
2023-09-04 is the first Monday in September 2023
September 2023 first Monday date = 2023-09-04

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Detailed Method (Step-by-Step)

The full reasoning shown clearly.

Step 1: Start from day 1

Day 1 of September 2023 is: 2023-09-01 (Friday).

Goal: find the first date whose weekday equals Monday.

Step 2: Move forward until it matches

The first matching date occurs after 3 day(s) from day 1.

Month start date 2023-09-01 (Friday)
Offset 3 day(s)
Result date 2023-09-04 (Monday)
Final: First Monday in September 2023 is 2023-09-04.
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Quick Table (First 14 Days)

Shows where the first match happens.

Day Date Weekday Note
1 2023-09-01 Friday
2 2023-09-02 Saturday
3 2023-09-03 Sunday
4 2023-09-04 Monday First Monday
5 2023-09-05 Tuesday
6 2023-09-06 Wednesday
7 2023-09-07 Thursday
8 2023-09-08 Friday
9 2023-09-09 Saturday
10 2023-09-10 Sunday
11 2023-09-11 Monday
12 2023-09-12 Tuesday
13 2023-09-13 Wednesday
14 2023-09-14 Thursday

Tip: The first Monday must occur between day 1 and day 7.

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