04:21 UTC is 4:21 AM on the UTC clock — 12:21 AM in New York, 4:21 AM in London, 9:51 AM in Mumbai, 1:21 PM in Tokyo. It is minute 262 of the 1,440 in a day, with 1,178 still to come before midnight UTC.
Converted for today, 2026-10-31, with daylight saving as it stands. In military and aviation time 04:21 UTC is written 0421Z, “Zulu”.
| City | Zone | 24-hour | 12-hour |
|---|---|---|---|
| Los Angeles | PDT | 21:21previous day | 9:21 PM |
| Denver | MDT | 22:21previous day | 10:21 PM |
| Chicago | CDT | 23:21previous day | 11:21 PM |
| New York | EDT | 00:21 | 12:21 AM |
| Toronto | EDT | 00:21 | 12:21 AM |
| Mexico City | CST | 22:21previous day | 10:21 PM |
| São Paulo | BRT | 01:21 | 1:21 AM |
| London | GMT | 04:21 | 4:21 AM |
| Lagos | WAT | 05:21 | 5:21 AM |
| Paris | CET | 05:21 | 5:21 AM |
| Berlin | CET | 05:21 | 5:21 AM |
| Rome | CET | 05:21 | 5:21 AM |
| Istanbul | TRT | 07:21 | 7:21 AM |
| Dubai | GST | 08:21 | 8:21 AM |
| Karachi | PKT | 09:21 | 9:21 AM |
| Mumbai | IST | 09:51 | 9:51 AM |
| Jakarta | WIB | 11:21 | 11:21 AM |
| Singapore | SGT | 12:21 | 12:21 PM |
| Manila | PHT | 12:21 | 12:21 PM |
| Shanghai | CST | 12:21 | 12:21 PM |
| Seoul | KST | 13:21 | 1:21 PM |
| Tokyo | JST | 13:21 | 1:21 PM |
| Sydney | AEDT | 15:21 | 3:21 PM |
| Auckland | NZDT | 17:21 | 5:21 PM |
On the1440.com every minute of the day is sold once. Whoever buys 04:21 UTC gets the whole front page from 04:21:00 to 04:21:59: their name in full-screen type, one line of copy and a link, with nothing else on the screen. It is a off-peak minute, so it costs $2.
Nothing yet. Every time 04:21 UTC has gone unsold, the1440.com showed dead air. The first name here is still up for grabs.