Yesterday was Day 20 of a season, Most of the league season has been completed and we are 2/3rds into the league season with nothing decided yet but most of us know about where we are going to finish in the league.
There are 4 days in a Top Eleven season where we have only 1 competitive fixture if we played every possible competitive fixture in a season in all 3 competitions: Day 1,2,20 & 28.
Day 1&2: Your actively looking at any cup draws and also making important decisions on how your team will look for the new season and also most of us will start to look for new players in the transfer market.
Day 28: Last league game of the season, many managers have an important game that could decide the teams success for the season or qualification for next seasons CL or simply fighting for promotion. Also managers will be clearing out unneeded players around this time and have next season in mind.
Day 20: Only the 1 league game on the day, Not a CL matchday and this is the day of the season where there is a gap between the Quarter-Final and Semi-Final of the cup, mainly a rest day for players and not much activity in the transfer market
Every other day: 2 competitive fixtures a day if your still in CL and CUP.
Also the Day 20 effect is around in the forums with not that many people posting in the forums and little updates in the players progress on that day and transfer markets are quiet since many don't need to buy players in the season.
IMO Day 20 is the most boring day of the Top Eleven season with many seasons of experience playing T11 and actively being on the forums.