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January 2028

31 daysStarts Saturday, ends Monday20 working days10 weekend daysISO weeks 52–5

Calendar grid for 1/2028, weeks starting Sun
ISO week
52
1
2
3
4
5

Holidays in January

  • New Year's DaySat, Jan 1 · Federal, observed Fri, Dec 31
  • Birthday of Martin Luther King, Jr.Mon, Jan 17 · Federal

Federal holidays from 5 U.S.C. §6103, plus widely kept US observances. 3 religious dates fall in January 2028 as well — see the calendar with every holiday.

Moon phases

  • First QuarterWed, Jan 5, 8:40 PM
  • Full MoonWed, Jan 12, 11:02 PM
  • Last QuarterTue, Jan 18, 2:25 PM
  • New MoonWed, Jan 26, 10:12 AM

Times in US Eastern. Computed from Meeus, Astronomical Algorithms, ch. 49.

The moon through January

  1. 1
  2. 3
  3. 5
  4. 7
  5. 9
  6. 11
  7. 13
  8. 15
  9. 17
  10. 19
  11. 21
  12. 23
  13. 25
  14. 27
  15. 29
  16. 31
The moon every other evening, drawn at its true illumination. The terminator is a semi-ellipse, not a straight edge — it only looks straight at the quarters.

About January 2028

January 2028 has 31 days. It begins on a Saturday and ends on a Monday, which gives the month five Saturdays, Sundays and Mondays — and only four of every other weekday. Of its 21 weekdays, 1 is a federal holiday, leaving 20 working days.

Because 1 January falls on a Saturday, the first days of the month still belong to ISO week 52 of 2027; ISO week 1 of 2028 does not begin until the first Monday.

New Year's Day falls on Saturday, January 1, 2028, observed on Friday, December 31, 2027 because it lands at the weekend. Birthday of Martin Luther King, Jr. falls on Monday, January 17, 2028.

The month runs from Saturday, January 1, 2028 to Monday, January 31, 2028, spanning ISO weeks 52 to 5.

Calendar with holidaysPrintable versionDownload PDFFull year 2028