Donegal will start their All Ireland Senior Championship campaign in mid July against Galway.
The LGFA confirmed the fixtures on Thursday with Donegal set for action in the second round of games.
The play Galway in Group 4 on the 17th July with Kerry the following weekend the 24th.
Dublin will begin their title defence against Tyrone on the opening weekend - July 10th.
Tyrone's second game is on the 24th July against Waterford.
The quarter Finals will take place the August Bank Holiday weekend and the final on the 5th September.
In the Junior Championship, Antrim meet Derry in an Ulster derby on the opening weekend.
2021 TG4 All-Ireland Senior Championship Fixtures
Round 1 – 10th July
Group 1 Armagh v Monaghan
Cavan v Mayo
Group 2: Cork v Meath
Group 3: Dublin v Tyrone
Group 4: Galway v Kerry
Round 2 – 17th July
Group 1: Monaghan v Mayo
Armagh v Cavan
Group 2: Cork v Tipperary
Group 3: Dublin v Waterford
Group 4: Donegal v Galway
Round 3 – 24th July
Group 1: Monaghan v Cavan
Armagh v Mayo
Group 2: Tipperary v Meath
Group 3: Tyrone v Waterford
Group 4 Kerry v Donegal
Quarter-finals – 31st July/ 1st August/2nd August
QF 1: 1st Group 1 v 2nd Group 2
QF 2: 1st Group 2 v 2nd Group 3
QF 3: 1st Group 3 v 2nd Group 4
QF 4: 1st Group 4 v 2nd Group 1
Semi-Finals – 14th August
SF 1: Winner Q/F 1 v Winner Q/F 2
SF 2: Winner Q/F 3 v Winner Q/F 4
Final – 5th September
2021 TG4 All-Ireland Junior Championship Fixtures
Round 1 – 11th July 2021
Antrim v Derry (To be played on Saturday 10th July)
Limerick v Wicklow
Round 2 – 18th July 2021
Antrim v Carlow
Derry v Limerick
Round 3 – 24th July 2021
Antrim v Limerick
Carlow (H) v Wicklow (Wicklow at Home in 2020)
Round 4 – 8th August 2021
Antrim v Wicklow
Carlow v Derry
Round 5 – 15th August 2021
Carlow v Limerick
Derry v Wicklow
Semi-Finals – 21st/22nd August 2021
1 v 4
2 v 3
Final – 5th September 2021