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| 1990, Jan. 1 |
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| President Havel declared amnesty for a large number of common prisoners. | 1 |
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| Jan. 30 |
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| The Czechoslovak Communist Party lost more than 100 seats in the Federal Assembly when a total of 120 new deputies were sworn in, only 9 of them Communists. | 2 |
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| Feb. 26 |
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| The Red Army began withdrawing its troops. | 3 |
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| March |
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| Constitutional and political Reforms: new laws allowed citizens to form associations without approval of the Interior Ministry and to gather or hold demonstrations without approval of the local government. New law regarding the press abolished censorship and allowed individuals to publish newspapers and magazines. | 4 |
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| March 29 |
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| Czechoslovakia adopted a new name to represent the Czech and Slovak Federative Republic: Czecho-Slovakia, written in Slovak. | 5 |
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| May |
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| The secret police agency was dismantled, and the death penalty was abolished. | 6 |
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| June 8–9 |
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| The Civic Forum and its Slovak parallel party, Public Against Violence, took 46.3 percent of the vote and 170 seats in the 300-member Federal Assembly. The Communist Party took 47 seats. | 7 |
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| Oct. 25 |
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| The Slovak parliament approved a law declaring Slovak the official language of the state. | 8 |
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| Dec. 12 |
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| The Czechoslovak Federal Assembly approved legislation that would lead to power sharing between the central government and the Czech and Slovak republics. | 9 |
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