The SSE Airtricity League has been extended by one week due to recent Covid-19 outbreaks.
The Premier Division season will now conclude on Sunday, 8 November, while the First Division season will now conclude on Tuesday, 27 October.
The decision to extend the 2020 season was ratified by the National League Executive Committee with the final rounds of both divisions pushed back for competition integrity purposes, with all fixtures scheduled for the same time and date.
The two St Patrick's Athletic fixtures which were affected by the squad's 14-day isolation have been rescheduled.
Finn Harps v St Pat's will be played on Wednesday, 28 October, with Saints' clash with Dundalk now taking place on Sunday, 1 November.
The two Galway United fixtures that were affected by coronavirus have also been rescheduled.
Galway United v Drogheda United will now take place Tuesday, 20 October and Bray Wanderers v Galway United will be played on Saturday, 24 October.
Dates for the Extra.ie FAI Cup quarter-finals have been scheduled.
The four fixtures will be in October and November due to Dundalk's progression in the UEFA Europa League, the November international window and the promotion/relegation play-offs, with kick-off times to be confirmed.
Extra.ie FAI Cup Quarter-Finals
Sligo Rovers v Derry City - Friday, 30 October
Athlone Town v Shelbourne - Saturday, 31 October
Finn Harps v Shamrock Rovers - Sunday, 1 November
Bohemians v Dundalk - Saturday, 14 November
The promotion/relegation play-off series has been rescheduled as well with the First Division play-off semi-finals set to take place on Saturday, 31 October, the First Division play-off final on Friday, 6 November and the promotion/relegation play-off final on Saturday, 14 November.