How many days in May 2028?

31 days

May 2028 runs from Monday the 1st to Wednesday the 31th.

Calendar grid for 5/2028, weeks starting Sun
ISO week	Sun	Mon	Tue	Wed	Thu	Fri	Sat
18	30	1Beltane	2	3	4Day of Arafah	5Eid al-Adha	6
19	7	8	9	10	11	12	13
20	14Lag BaOmer	15	16	17	18	19	20
21	21	22	23	24	25Islamic New Year	26	27
22	28	29Memorial Day	30	31Shavuot	1	2	3

About May 2028

May 2028 has 31 days, of which 23 are weekdays and 8 fall at the weekend. Taking out the 1 federal holiday leaves 22 working days.