The FAW National Leagues Board has agreed the following dates for the 2025/26 JD Cymru Leagues season.
- Opening weekend: 8-10 August 2025
- Final round of Phase One fixtures: 9-11 January 2026
- Beginning of Phase Two: 23-25 January 2026
- Final round of Phase Two fixtures: 17-19 April 2026
- Play-Off Quarter-Final(s): 21-22 April 2026
- Play-Off Semi-Final(s): 24-26 April 2026
- Play-Off Final: 1-3 May 2026
JD Cymru North & JD Cymru South
- Opening weekend: 25-27 July 2025
- Final round of fixtures: 17-19 April 2026
- Round One: 18-20 July 2025
- Round Two: 1-3 August 2025
- Round Three: 9-10 September 2025
- Quarter-Finals: 4-5 November 2025
- Semi-Finals: 5-7 December 2025
- Final: 27 February – 1 March 2026
