Home Weekday After If today is Friday, after 90 days

If today is Friday, what day is it after 90 days?

Answer: Thursday

Weekdays repeat every 7 days. So we only need the remainder after dividing 90 by 7, then move forward that many days from Friday.

Quick rule: remainder = 90 mod 7 = 6 → move forward 6 day(s) from FridayThursday

Quick Answer

What is Friday + 90 days?

These sentences all mean the same thing:

If today is Friday, after 90 days it will be Thursday
Friday + 90 days = Thursday
90 days after Friday is Thursday
The weekday 90 days after Friday is Thursday

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Detailed Math (Step-by-Step)

We show the whole operation clearly (modulo 7).

Step 1: Find the remainder

Since weekdays repeat every 7 days: days mod 7 tells us how far to move forward.

Days 90
Divide by 7 12 remainder 6
Remainder 6
Meaning: Jump whole weeks first (they don’t change the weekday), then move the remainder days.

Step 2: Move forward 6 day(s)

Start at Friday and count forward 6 step(s).

Step Weekday
0Friday (start)
1Saturday
2Sunday
3Monday
4Tuesday
5Wednesday
6Thursday (result)
Final: Friday + 90 days = Thursday
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Quick Lookup Table

Common values starting from Friday.

Days after Friday Weekday Remainder (mod 7)
0 Friday 0
1 Saturday 1
2 Sunday 2
3 Monday 3
4 Tuesday 4
5 Wednesday 5
6 Thursday 6
7 Friday 0
8 Saturday 1
9 Sunday 2
10 Monday 3
14 Friday 0
21 Friday 0
28 Friday 0
30 Sunday 2
90 Thursday 6

Tip: Any number of days that differs by a multiple of 7 lands on the same weekday.

Instant Calculator

Change weekday and day count to see the result immediately.

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