4 January 1940 - DAY 36 of Winter War
Northern Finland: Colonel Siilasvuo gives his troops the final order to attack.
Salla: Detachment Roininen breaks off its attack at Joutsijärvi.
Eastern Isthmus: Finnish troops repulse the enemy offensive at Kirvesmäki in the Taipale sector.
The Ministry of Education urges parish priests and officials to reserve areas for establishing heroes' cemeteries as a matter of urgency
The voluntary defence organization Maan Turva organizes a tour of the front by well-known entertainers which becomes popularly known as the 'anti-boredom battery'. The main attractions are the popular character actor Aku Korhonen and the conductor George de Godzinsky. Others taking part in the tour include Siiri Rantanen, Uuno Laakso, the accordionist Onni Laihanen, and the actress Tuire Orri.
The period for completing tax return forms and paying both income and property tax is extended to April 1st.
Members of the public are forbidden to take photographs of the damage caused by enemy bombers or of equipment used for military or civil defence.
Abroad: Sweden rejects the Allied offer of assistance in respect of both armaments and troops.
An anonymous Danish businessman announces he is to donate 50 lorries to Finland.
Daily losses: 139
Musical instruments left behind by Soviet forces. (Pelkosenniemi)