PREVIOUSLY ASKED IN:
WBPSC Miscellaneous Preliminary 2023
Answer
Saturday
Explanation
2024 is a leap year. From Jan 12, 2024 (Friday) to Jan 12, 2025, there are 366 days, which gives 2 odd days. So, Jan 12, 2025 is a Sunday. Calculating the days from Jan 12 to June 7, 2025: Jan (19) + Feb (28) + Mar (31) + Apr (30) + May (31) + Jun (7) = 146 days. 146 divided by 7 leaves a remainder of 6 odd days. Sunday + 6 days = Saturday.
Key Points
- > A normal year has 365 days, yielding 1 odd day.
- > A leap year has 366 days, yielding 2 odd days.
- > 2024 is a leap year because it is divisible by 4.
- > Months with 31 days: Jan, Mar, May, Jul, Aug, Oct, Dec.
- > Months with 30 days: Apr, Jun, Sep, Nov.
- > Odd days are the remainder when total days are divided by 7.
- > Adding 6 days to a given day is the same as subtracting 1 day.
Additional Information
Months and Odd Days
| Month | Total Days | Odd Days (mod 7) |
|---|---|---|
| Jan, Mar, May, Jul, Aug, Oct, Dec | 31 | 3 |
| Apr, Jun, Sep, Nov | 30 | 2 |
| February (Normal / Leap) | 28 / 29 | 0 / 1 |
Memory Tips
- Knuckle Method: The knuckles represent 31-day months, the spaces between represent 30-day months (except Feb).