During normal operation, the 60 kHz signal from WWVB is transmitted 24 hours per day, 7 days a week. The table includes periods since January 1, 2006 when the signal was off or intermittent for more than 5 minutes.
| Date | MJD | Began (UTC) | Ended (UTC) |
|---|---|---|---|
| 12-30-2008 | 54830 | 0835 | 0922 |
| 12-30-2008 | 54830 | 0613 | 0712 |
| 12-26-2008 | 54826 | 1812 | 1926 |
| 12-24-2008 | 54824 | 0543 | 0642 |
| 12-13-2008 | 54813 | 0546 | 0644 |
| 12-11-2008 | 54811 | 1936 | 2017 |
| 12-03-2008 | 54803 | 0450 | 0547 |
| 12-02-2008 | 54802 | 1955 | 1959 |
| 11-06-2008 | 54776 | 2350 | 2354 |
| 09-10-2008 | 54719 | 0100 | 0145 |
| 08-25-2008 | 54703 | 0846 | 1001 |
| 08-06-2008 | 54684 | 2304 | 2312 |
| 07-23-2008 | 54670 | 1940 | 1956 |
| 07-05-2008 | 54652 | 0117 | 0213 |
| 06-30-2008 | 54647 | 0938 | 1053 |
| 06-25-2008 | 54642 | ---- | 0018 |
| 06-24-2008 | 54641 | 2327 | ---- |
| 06-01-2008 | 54618 | 1244 | 1335 |
| 05-23-2008 | 54609 | 2158 | 2229 |
| 05-08-2008 | 54594 | 0111 | 0219 |
| 04-16-2008 | 54572 | 0522 | 0618 |
| 04-09-2008 | 54565 | 0710 | 0817 |
| 04-02-2008 | 54558 | 1156 | 1236 |
| 01-29-2008 | 54494 | 1108 | 1219 |
| 01-28-2008 | 54493 | 1838 | 1850 |
| 01-11-2008 | 54476 | 1148 | 1336 |