Western Front
Ferdinand Foch assumes temporary command of Eastern Army Group (until March 26) for Noël Castelnau, which is on Allied mission to Russia.
Foch’s CoS Weygand goes to Berne for secret talks with Swiss General Staff on steps against any German invasion of Switzerland.

Eastern Front
Airship LZ-97 raids Kishinev, Rumania.
Dobruja: 2 Bulgarian battalions cross south arm of Danube near Tulcea but thrown back on January 23, losing 337 PoWs.
Romania: Battle of Pralea: Following heavy artillery bombardment, German and Austro-Hungarian troops launch attacks on Russian lines along the Stokhid River.

Naval and Overseas Operations
Baltic: German submarine SM U-76 founders in bad weather and then collides with a Russian trawler, resulting in the submarine sinking.
North Sea: Two destroyer actions by night in North Sea. One German destroyer sunk and one (V-69) towed damaged into Ymuiden. One British destroyer lost. [ed note: I can find no evidence of a second action, nor any reference to a British destroyer being sunk. Nor was a German destroyer sunk outright. The High Seas Torpedo Boats {further note: The German Hochseetorpedoboote were the rough equivalent of destroyers in other navies, and often referred to as such} G-41 & V-69 were both damaged and collided during this action, but both made it to port.] Wikipedia has this to say: On 22 January 1917, 11 torpedo boats of the 6th Torpedo Boat Flotilla, including G41 left Helgoland to reinforce the German torpedo forces in Flanders. The British Admiralty knew about this transfer due to codebreaking by Room 40, and ordered the Harwich Force of cruisers and destroyers to intercept the German torpedo boats. During the night of 22–23 January, the 6th Flotilla encountered three British light cruisers (Aurora, Conquest and Centaur). The Germans attempted a torpedo attack against the British cruisers, but were driven off by heavy fire and broke off the attack behind a smoke-screen. V69, leader of the flotilla, and the only torpedo boat to succeed in launching any torpedoes, was hit by three shells, one of which jammed her rudder, forcing her to move in a circle. G41 collided with V69 twice in the resulting confusion, with the second collision caused one of V69's torpedoes to explode. Both torpedo boats were badly damaged as a result of the collisions, and G41 was hit two more times by British shells, knocking out the ship's aft gun and forward torpedo tubes before managing to lose the chasing British cruisers in the smoke. G41 managed to reach Zeebrugge via Dutch territorial waters, while V69 made for Ijmuiden in the Netherlands, where she was repaired, returning to Germany on 12 February.
East Africa: 150 German soldiers repel 125 KAR (King’s African Rifles) from Mpotora, west of Kilwa.

Political, etc.
United Kingdom: Britain announces that all men aged 18 years will be called up for home defense, lowering the age from the former 18 years & 7 months.
Italy: The Bank of Italy and other Italian banks lend Russia $50 million, which will be used to purchase Italian war supplies.
United States: Polish organization in the U.S. asks President Wilson to recognize the Kingdom of Poland, which was established by the Central Powers.
Rockefeller Foundation defends plan for a “modern school,” which will teach French and German instead of Latin and Greek.
Ammunition exports from the U.S. to Europe has passed more than $1 billion in value since the start of the war.
In a speech to the Senate, President Wilson proposes abandoning isolation and establishing a world league to maintain peace.

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On the kinkometer, my kink measures as a sine wave.