Bitcoin halving history
Review the dates and block heights of completed halvings, plus provisional low/high coordinates by season.
Four completed halvings
Bitcoin crossed halving targets in 2012, 2016, 2020, and 2024. Each target advances by another 210,000 blocks.
Coordinates measure time from halving
A low coordinate of −516 means the selected date is 516 days before that season’s halving. A high coordinate of +535 means 535 days after. The coordinate does not represent price magnitude.
A shared axis makes calendar events from different years comparable around the same reference point.
Separate observations from interpretation
Halving dates and heights can be verified on-chain. Selecting a cycle low or high, however, depends on timezone, data coverage, and the rule used to choose it.
They will not be marked confirmed until the operator approves the final definition and primary sources.
Coordinates and dates by season
| Season | Low offset | Low date | Halving | High offset | High date |
|---|---|---|---|---|---|
| Season 1 Provisional | -376 | 2011-11-18 | 2012-11-28 #210,000 |
+367 | 2013-11-30 |
| Season 2 Provisional | -542 | 2015-01-14 | 2016-07-09 #420,000 |
+526 | 2017-12-17 |
| Season 3 Provisional | -513 | 2018-12-15 | 2020-05-11 #630,000 |
+548 | 2021-11-10 |
| Season 4 Provisional | -516 | 2022-11-21 | 2024-04-20 #840,000 |
+535 | 2025-10-07 |
| Season 5 Forecast | -542–-513 | 2026-10-09 – 2026-11-07 |
2028-04-03 #1,050,000 |
+526–+548 | 2029-09-11 – 2029-10-03 |
- Bitcoin launched on 2009-01-03.
- The Season 5 halving date can change with actual block production speed.
- Season 5 low and high coordinates carry forward past observed ranges as simple references; they are not confirmed dates.