Below are the essential dates as far as the 2017/18 UEFA Champions League, which is the European football’s premier club competition, is concerned:
| Event | Dates |
| First and second qualifying round draws | June 19 (Monday) |
| 1st qualifying round | 27, 28 June and 4, 5 July (second leg) |
| 2nd qualifying round | 11, 12 and 18, 19 July (second leg) |
| Third qualifying round draw | July 14 (Friday) |
| 3rd qualifying round | 25, 26 July and 1, 2 August (second leg) |
| Playoff round draw | August 4 (Friday) |
| Playoff | 15, 16 and 22, 23 August (second leg) |
| Group stage draw | August 24 (Thursday) |
| Matchday one | 12, 13 September |
| Matchday two | 26, 27 September |
| Matchday three | 17, 18 October |
| Matchday four | 31 October and 1 November |
| Matchday five | 21, 22 November |
| Matchday six | 5, 6 December |
| Round of 16 draw | December 11 (Monday) |
| R-16 first leg | 13, 14 and 20, 21 February |
| R-16 second leg | 6, 7 and 13, 14 March |
| Quarter-final draw | March 16 (Friday) |
| Quarter-final first leg | 3, 4 April |
| Quarter-final second leg | 10, 11 April |
| Semi-final and Final draws | April 13 (Friday) |
| Semi-final first leg | 24, 25 April |
| Semi-final second leg | 1, 2 May |
| Final | May 26 (Saturday) |
*All matches except the Final will be played on Tuesdays and Wednesdays.
The 2017/18 UEFA Champions League Final will be hosted by the Olimpiyskiy National Sports Complex in Kiev, Ukraine.