How many days in September 2029?

30 days

September 2029 runs from Saturday the 1st to Sunday the 30th.

Calendar grid for 9/2029, weeks starting Sun
ISO week	Sun	Mon	Tue	Wed	Thu	Fri	Sat
35	26	27	28	29	30	31	1
36	2	3Labor Day	4	5	6	7	8
37	9National Grandparents Day	10Rosh Hashanah	11Patriot Day	12	13	14	15
38	16	17	18	19Yom Kippur	20	21	22Mabon
39	23	24Sukkot	25	26	27	28	29
40	30	1	2	3	4	5	6

About September 2029

September 2029 has 30 days, of which 20 are weekdays and 10 fall at the weekend. Taking out the 1 federal holiday leaves 19 working days.