10 January – 18th Final of The Great Orchestra of Christmas Charity (for the second time for children with oncological diseases), oncology clinics for retrofitting the highly specialized equipment.
17 January – Referendum on the appeal of:
The president of Łódź - The inhabitants decided to remove from office Jerzy Kropiwnicki before the expiry of his term.
The mayor of Brwinów - The residents decided to remove Andrzej Guzik from his position 10 months before the expiry of his term, as required, but the mayor is not canceled.
February
10–11 February – In the Atlas Arena in Łódź 2 Depeche Mode concerts were held in exchange for the canceled concert in Warsaw.
A week of national mourning was introduced, later extended to 9 days.
Coffin of Lech Kaczyński in the Presidential Palace's chapel
11 April – At the military airport Warsaw-Okecie an aircraft landed with the body of the late President Lech Kaczyński. The coffin was transported to the Presidential Palace. On the route of the procession crowds reflected the honour of deceased countryman.
17 April – The Warsaw farewell ceremony were held in honour of the victims of a plane crash near Smolensk.
18 April – In Kraków, the funeral of the presidential couple, Lech and Maria Kaczyński took place.
29 April – The highest win in the Lotto was won in Elblag and totalled 24 636 124.00 PLN.
30 April – The Department of Computer Science of PKP turned off the last operating system in Poland based on a computer teleprocessing 1305th Oder.
May
7 May – Gen. Mieczyslaw Cieniuch became chief of General Staff.
11 May – Polish thirteen-year-old astronomy lover Rafał Reszelewski discovers Sungrazing Comets Kreutz group comet as the youngest in the project.
12 May – PZU shares debuted on the Warsaw stock exchange.
15 May – Lech Poznań became the Polish soccer Champion.
16 May – Rapid flooding of rivers in the basin of upper Odra and Vistula rivers gave rise to the great flood, which covered the whole southern Poland.
re-enactment of the Battle of Klushino - Feast Day of Glory hussars and Polish Arms - Warsaw.
8 July – President-elect Bronislaw Komorowski gave up his parliamentary mandates and functions of the Marshal of the Sejm, and thus ceased to perform the duties of the President, which, for a few hours filled the Marshal of the Senate, Bogdan Borusewicz, and in the evening under the Constitution of the head of state newly elected Marshal of the Sejm Grzegorz Schetyna. In one day, Poland had three politicians taking over the officiating president.[5][6]
7 August – Bogatynia was flooded by the river flowing through the town, named Miedzianka.
9–10 August – A night happening against the presence of the cross of Smolensk before the Presidential Palace in Warsaw.
16 August:
The jubilee rally on the occasion of the 100th anniversary of scouting in Poland began in Kraków. The inauguration of the rally, held on 17 August, attended by Prime Minister Donald Tusk - the honorary patron of the rally.
Beginning of construction of the second line of the Warsaw metro.
18 August – The hall opened in Gdańsk-Sopot.
September
16 September – The cross, erected by the Scouts in time of national mourning after the Polish Air Force Tu-154 crash before the Presidential Palace in Warsaw disappears.
20 September – Completion of the Municipal Stadium in Poznań.
24 September:
The Sejm appointed 6 January (Epiphany), again a public holiday.
Kraków: An underground museum opened beneath the Market Square. The exhibition, entitled "Traces of the European identity of Krakow" is a multimedia spectacle, a journey in time. Visitors can not only see but also touch the history of the origins of the legendary city.
25 September – Wrocław held the second Equality March.
