21:00 UTC is 9:00 PM on the UTC clock. The hour runs from 21:00 to 21:59 UTC — minutes 1261 to 1320 of the 1,440 in a day.
| City | Zone | 24-hour | 12-hour |
|---|---|---|---|
| Los Angeles | PST | 13:00 | 1:00 PM |
| Denver | MST | 14:00 | 2:00 PM |
| Chicago | CST | 15:00 | 3:00 PM |
| New York | EST | 16:00 | 4:00 PM |
| Toronto | EST | 16:00 | 4:00 PM |
| Mexico City | CST | 15:00 | 3:00 PM |
| São Paulo | BRT | 18:00 | 6:00 PM |
| London | GMT | 21:00 | 9:00 PM |
| Lagos | WAT | 22:00 | 10:00 PM |
| Paris | CET | 22:00 | 10:00 PM |
| Berlin | CET | 22:00 | 10:00 PM |
| Rome | CET | 22:00 | 10:00 PM |
| Istanbul | TRT | 00:00next day | 12:00 AM |
| Dubai | GST | 01:00next day | 1:00 AM |
| Karachi | PKT | 02:00next day | 2:00 AM |
| Mumbai | IST | 02:30next day | 2:30 AM |
| Jakarta | WIB | 04:00next day | 4:00 AM |
| Singapore | SGT | 05:00next day | 5:00 AM |
| Manila | PHT | 05:00next day | 5:00 AM |
| Shanghai | CST | 05:00next day | 5:00 AM |
| Seoul | KST | 06:00next day | 6:00 AM |
| Tokyo | JST | 06:00next day | 6:00 AM |
| Sydney | AEDT | 08:00next day | 8:00 AM |
| Auckland | NZDT | 10:00next day | 10:00 AM |
On the1440.com each of these minutes is sold to one buyer, who gets the whole front page for sixty seconds. This is a peak hour: $3 a minute, or $60 for all sixty in one purchase.