Both Iran and Israel have denied violating a cease-fire deal after it was announced by President Trump Monday evening, despite a night of strikes and counter-strikes in the hours surrounding the time when the truce was set to take effect.

The absence of details regarding the deal, confusing wording in Mr. Trump’s initial announcement on social media and differences in time zones may have contributed to the ambiguity over the precise timing of the cease-fire.

Although both countries presented competing versions of the night’s events, their explanations — and quiet skies over both countries as night fell Tuesday — suggested that they both wanted the cease-fire to hold. Here is what we know about what unfolded overnight.

1. In a post on Truth Social, President Trump announces a cease-fire to begin to take effect 6 hours later.
2. 3:00 a.m. local time
3. The Israeli military says it launched a strike on Tehran. Residents nearby say they hear explosions.
4. The Israeli military strikes missile launchers in western Iran that it says were poised to fire at Israeli territory.
5. 4:00 a.m. local time
6. Posts from Iran’s foreign minister indicate that he believed the cease-fire would begin at this time. The timing does not align with what Trump posted.
7. Iranian state TV announces a cease-fire.
8. At least four people are killed in Beersheba by a missile barrage, which Israel says came from Iran.
9. Cease-fire should take effect, according to the timeline Trump outlined.
10. Iran launches one missile at Israel, according to the Israeli military.
11. Trump warns in a Truth Social post that Israel and Iran should not violate the cease-fire.
12. Israel launches three waves of attacks against Iran after the cease-fire was set to begin, according to the Iranian military, with the last one ending at this time.
13. Israel’s government issues a statement saying it has agreed to a mutual cease-fire.
14. Iran launches two missiles, according to the Israeli military, setting off sirens in northern Israel.
15. The Israeli military vows to retaliate against Iran for sending missiles into Israel after the cease-fire. Iran’s military denied that it had fired any missiles after the cease-fire began, according to Iranian state news outlets.
16. Speaking to reporters, Trump expresses frustration at Israel for its attack after the announcement of the cease-fire, but before it began.
17. Trump posts on Truth Social demanding that Israel refrain from attacking Iran.
18. Israel retaliates with limited strikes on a radar facility in Babolsar, about 95 miles northeast of Tehran.