Logbook of The World (LoTW), ARRL’s online QSO confirmation system, will undergo scheduled maintenance beginning Monday, December 21, at 2300 UTC (6 PM EST) for approximately 6 hours. LoTW will be offline and unavailable while the system’s server is upgraded to new hardware. Thank you for your understanding.
Click here for original story, Logbook of The World to be Offline for Approximately 6 Hours
Source: ARRL