Ten season-defining fixtures are set to take place over eleven days across the Vanarama National League North and Vanarama National League South.
Since 2018, the play-off positions have been extended to six - with the champions being promoted automatically.
In both leagues, the remaining six fight it out for one final slot with two Eliminator matches taking place before the semi-finals.
The one-off match format has added even more excitement and kept more clubs involved in the shake-up for longer.
All ties are single-leg matches with extra time and penalties used if necessary.
The National League consulted with clubs about the dates of the play-off semi-finals and a possible clash with the FA Cup Final.
Following this consultation, clubs will be granted permission to switch their semi-final from Saturday 14 May to Sunday 15 May if both clubs agree to do so.
Fixture changes will be agreed and confirmed by no later than Thursday 12 May.
Promotion Finals will be held at the home ground of the finalist who finished higher in the regular league season.
Confirmed schedule of the Vanarama National League North and South play-offs:
Eliminator A – Wednesday 11 May - 5th place vs 6th place – 7.45pm
Eliminator B – Thursday 12 May - 4th place vs 7th place – 7.45pm
Semi-Final – Saturday 14 May* - 2nd place vs winner of Eliminator A – 3pm
Semi-Final – Sunday 15 May - 3rd place vs winner of Eliminator B – 3pm
Promotion Final – Saturday 21 May – 3pm
*Subject to change to Sunday 15 May if both clubs are in agreement