Following boycotts in Croatia on January 24, and in conjunction with a follow-up boycott in the country, residents of Bosnia and Herzegovina, Serbia, Montenegro, and North Macedonia start a boycott of retail stores in response to rising prices.
A 5.5% pay increase for teachers in Northern Ireland, backdated to 1 September 2024, has been formally offered by teaching employers. The offer includes new agreements on workloads and a commitment to limit industrial action.
The Office of Management and Budget rescinded a memo that would have paused federal financial assistance programs, following a federal judge's temporary block of the order. The White House confirmed it would continue pursuing a freeze of federal funds.
In tennis, Jannik Sinner defeats Alexander Zverev 6–3, 7–6 (7–4), 6–3, in the men's singles final to win his second Australian Open title and his third Grand Slam overall.
Israeli soldiers fired on Lebanese Army personnel and civilians in two southern Lebanese villages, resulting in 22 deaths and at least 124 injuries on the day of a scheduled Israeli military withdrawal under a ceasefire agreement.
Hamas freed four Israeli hostages, including Naama Levy, in a swap for 200 Palestinian prisoners, among them 121 convicted of deadly attacks, as part of a fragile ceasefire deal.
Henry Patten and Harri Heliövaara defeat Simone Bolelli and Andrea Vavassori 6–7 (16–18), 7–6 (7–5), 6–3, in the men's doubles final to win their first Australian Open title and their second joint Grand Slam title.
A wind gust provisionally measured at was recorded in Connemara in County Galway, Ireland, and a mean wind speed measured at , would surpass Ireland's previous records.
A man found guilty of killing three children and injuring 10 others in a mass stabbing in Southport was sentenced to life imprisonment with a minimum of 52 years in Liverpool.
Fianna Fáil and Fine Gael form a coalition government with the backing of several independent TDs. Fianna Fáil leader Micheál Martin is elected as Taoiseach, with Fine Gael leader Simon Harris as Tánaiste.
In tennis, John Peers and Olivia Gadecki, both from Australia, defeats Kimberly Birrell and John-Patrick Smith 3-6, 6-4, 10-6, in the mixed doubles final to win their first Australian Open title.
The Houthis report releasing 25 crew members of the Japanese-operated Galaxy Leader to Oman, citing support for a 2025 Israel–Hamas war ceasefire as the reason. The vessel was seized while operating under the Japanese shipping line NYK and owned by Galaxy Maritime Ltd, registered in the Isle of Man.
Four people are injured, one seriously, in a stabbing attack in Tel Aviv, Israel. The Shin Bet confirm that the attacker was a 28-year-old from Morocco, and had permanent residency in the United States.
Donald Trump and JD Vance were inaugurated as the 47th president and 50th vice president of the United States in Washington, D.C., with Trump becoming the first president since Grover Cleveland to serve non-consecutive terms.
A 9% pay deal was offered to Northern Ireland civil servants, including a 3% rise backdated to August 2024 and a 6% rise from August 2025, covering about 25,000 staff across Stormont departments.
Israeli forces have recovered the body of Staff Sgt. Oron Shaul, who was captured and killed by Hamas during the 2014 Gaza War. The recovery was conducted in a clandestine operation in the Gaza Strip.
Protests occurred in Washington, D.C., and several UK cities under the rebranded People's March, opposing President-elect Donald Trump's second inauguration.
The Department of Agriculture, Environment and Rural Affairs confirms bird flu in three wild birds, marking the first wild case since September 2023. An Avian Influenza Prevention Zone was activated, requiring all bird keepers to follow strict biosecurity measures.