Around 35 minutes in when Jack Roberts spreads out his map on the table, a small camera (about to shoot a close-up of the map) moves into frame on the left side of the screen.
Steed looks at his watch and starts the five second count down to New Years, as we look at his watch as well, it clearly shows the time as 11:59:10pm. Steed and the party clearly celebrated New Years' 45 seconds early.