This from the FSF:
We're big fans of Non-League Day here at the FSF as the leading nationwide event to support non-league football is now entering its seventh year.
Across the country, non-league clubs will be looking for your support - you can find a match to attend with NLD's handy match-finder here - and hoping newcomers will catch the non-league bug.
Adrian Rowland, from Warrington Town Supporters' Club, told us: "It's an opportunity for fans with a spare Saturday to get their fix and support their local growing teams.
"Fans sometimes forget that without Non-League professional football wouldn't have a pool to dip into or indeed support those players that don't quite make it.
"If you haven't tried non-league football, then this is your opportunity. As an ex-Premier League season ticket holder and now non-league season ticket holder, the bug is easily caught."
Non-League Day is slightly earlier in the footballing calendar than it has been previously. Organisers hope the earlier date with better weather prospects will increase the numbers through club turnstiles.
"It then came down to September and November," Non-League Day said. "The former coincides with a round of the FA Cup while the latter sees matches in the FA Vase and FA Trophy so on both dates 200 or so clubs are affected.
"With the weather potentially a lot worse in mid-November than early September and the FA Cup being a highly marketable attraction to neutrals, we decided to go with that."
The September date has the added bonus of not coinciding with international matches for any of the home nations which frees up more clubs and fans in Northern Ireland, Scotland and Wales to also take part if they wish.
This year Non-League Day will crowdfunding money for Prostate Cancer UK - it's official partner charity - and has set a fundraising target of £10,000.
Clubs across the country will no doubt have some great deals on, so make sure you check out what's nearby.