Battle of the Atlantic
- The Irish passenger-mail ship Munster is sunk by a mine in the Irish Sea.
- The British steamer Munster (4305t) sinks near Mersey Light on a mine laid by U-30 on 9 January. 134 survivors, all that are on board, are rescued by the British steamer Ringwall.
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]Finland - Winter War
Day 70
Second Battle of Summa continues. On the Karelian Isthmus the non-stop Soviet artillery bombardment, bombing and tank and infantry assaults are now in their seventh day. The Finns are very tired and their artillery is running short of ammunition. On the central Isthmus Soviet tanks and infantry mount 2 separate assaults in Summa village but both are successfully repulsed by the Finns. On the Ladoga Karelia in the Aittojoki sector Detachment Pajari is attempting to strike the Russians to the west of the Kuukkausjoki. The Finnish attack grinds to halt in the evening due to heavy Russian fire. In northern Finland the Soviet detachment that had entered Finnish territory south of Raate is pushed back across the border.
The Soviets carry out a surprise bombing raid on Kajaani where the headquarters of the North Finland Group are located. 4 people are killed and several buildings destroyed including the town hospital.
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