23:00 UTC is 11:00 PM on the UTC clock. The hour runs from 23:00 to 23:59 UTC — minutes 1381 to 1440 of the 1,440 in a day.
| City | Zone | 24-hour | 12-hour |
|---|---|---|---|
| Los Angeles | PDT | 16:00 | 4:00 PM |
| Denver | MDT | 17:00 | 5:00 PM |
| Chicago | CDT | 18:00 | 6:00 PM |
| New York | EDT | 19:00 | 7:00 PM |
| Toronto | EDT | 19:00 | 7:00 PM |
| Mexico City | CST | 17:00 | 5:00 PM |
| São Paulo | BRT | 20:00 | 8:00 PM |
| London | GMT | 23:00 | 11:00 PM |
| Lagos | WAT | 00:00next day | 12:00 AM |
| Paris | CET | 00:00next day | 12:00 AM |
| Berlin | CET | 00:00next day | 12:00 AM |
| Rome | CET | 00:00next day | 12:00 AM |
| Istanbul | TRT | 02:00next day | 2:00 AM |
| Dubai | GST | 03:00next day | 3:00 AM |
| Karachi | PKT | 04:00next day | 4:00 AM |
| Mumbai | IST | 04:30next day | 4:30 AM |
| Jakarta | WIB | 06:00next day | 6:00 AM |
| Singapore | SGT | 07:00next day | 7:00 AM |
| Manila | PHT | 07:00next day | 7:00 AM |
| Shanghai | CST | 07:00next day | 7:00 AM |
| Seoul | KST | 08:00next day | 8:00 AM |
| Tokyo | JST | 08:00next day | 8:00 AM |
| Sydney | AEDT | 10:00next day | 10:00 AM |
| Auckland | NZDT | 12:00next day | 12:00 PM |
On the1440.com each of these minutes is sold to one buyer, who gets the whole front page for sixty seconds. This is a off-peak hour: $2 a minute, or $40 for all sixty in one purchase.