This is reported by Roscosmos in its Telegram channel.
"The launch of the Soyuz-ST-B carrier rocket with Galileo spacecraft has been postponed for a day due to unfavorable weather conditions," the message says.
The rocket is expected to start at 3:19 Moscow time on December 5.
Earlier it was reported that the commission allowed the Soyuz rocket to refuel at the Kuru cosmodrome.