Vitamin D

The sun, month by month

Sunrise and sunset in Tokyo in September

On September 1 in Tokyo the sun rises at 05:14 and sets at 18:07; on day 30 it rises at 05:37 and sets at 17:24. Over the month the day gets 67 minutes shorter.

Sunrise05:25
Sunset17:46
Golden hour17:13–17:46
Day length12 h 21 min

Day by day

All times are local to Tokyo. Dawn and dusk mark civil twilight.

DayDawnSunriseSunsetDuskDay length
104:4805:1418:0718:3312 h 53 min
204:4905:1518:0618:3212 h 51 min
304:5005:1618:0418:3012 h 49 min
404:5105:1718:0318:2912 h 46 min
504:5205:1718:0118:2712 h 44 min
604:5205:1817:6018:2612 h 42 min
704:5305:1917:5818:2412 h 39 min
804:5405:2017:5718:2312 h 37 min
904:5505:2117:5518:2112 h 35 min
1004:5605:2117:5418:2012 h 33 min
1104:5605:2217:5218:1812 h 30 min
1204:5705:2317:5118:1612 h 28 min
1304:5805:2417:4918:1512 h 26 min
1404:5905:2417:4818:1312 h 23 min
1504:6005:2517:4618:1212 h 21 min
1605:0105:2617:4518:1012 h 19 min
1705:0105:2717:4318:0912 h 16 min
1805:0205:2817:4218:0712 h 14 min
1905:0305:2817:4018:0612 h 12 min
2005:0405:2917:3918:0412 h 09 min
2105:0505:3017:3718:0312 h 07 min
2205:0505:3117:3618:0112 h 05 min
2305:0605:3217:3417:5912 h 02 min
2405:0705:3217:3217:5812 h 00 min
2505:0805:3317:3117:5611 h 58 min
2605:0905:3417:2917:5511 h 55 min
2705:0905:3517:2817:5311 h 53 min
2805:1005:3617:2617:5211 h 51 min
2905:1105:3617:2517:5011 h 49 min
3005:1205:3717:2417:4911 h 46 min

Approximate astronomical values: they can shift a minute or two from year to year.

What about vitamin D in September?

In September, the typical synthesis window in Tokyo runs from 09:00 to 15:00: with medium skin and a t-shirt, ~7 min at the best moment is enough.

See the Tokyo vitamin D guide