Below holds a list of the significant changes to EastEnders' transmission arrangements and technical standards since 1985. Minor or short-term changes to the schedules are not listed but detailed on individual episode pages.
- Tuesday 19 February 1985 - the series' first episode is broadcast at 7:00pm; episodes continue on Tuesday and Thursday at 7.00pm.
- Tuesday 3 September 1985 - The broadcast pattern changes to Tuesday and Thursday at 7:30pm.
- Monday 11 April 1994 - The series begins broadcasting a third regular episode each week; transmission is now Monday at 8:00pm and Tuesday and Thursday at 7:30pm.
- Thursday 30 September 1999 - The programme is broadcast in widescreen format for the first time.
- Monday 6 August 2001 - The series begins broadcasting a fourth regular episode each week; transmission is now Monday and Friday at 8:00pm and Tuesday and Thursday at 7:30pm.
- Saturday 25 December 2010 - The programme is broadcast in high definition for the first time.
- Monday 7th March 2022 - Transmission is now Monday, Tuesday, Wednesday and Thursday at 7:30pm.