Outside of London and the South East, Friday evening play never really went away. The introduction of the e2e4 style of weekend event brought it back to the South East, although in fairness, it's less painful to play a Friday evening if you are staying where you play.Nick Grey wrote: I think Fri nights stopped 25 years ago, & move towards 2 games a day maximum since push towards FIDE.
What did go away was six round tournaments. Tournaments with Friday evening play schedule only two rounds on the Saturday. The Irish, Bunratty being an example, still go for the six round stamina test.
Whilst you are allowed to have three rounds a day in FIDE rated tournaments, the minimum session length of 4 hours for an Open is likely to lead to a timetable with 9 am starts and 11 pm finishes, particularly if an increment is used.