The top division of the Reserve League comprises 18 clubs, who will play each other once for a total of 17 matches across the season.
Reserve League 2, which begins next week, is made up of nine clubs - they will play each other once at home and once away for a total of 16 matches across the campaign.
Hibernian, who won the Development League last season, kick off 2018/19 with a home game against Partick Thistle at Oriam.
This week’s SPFL Reserve League fixtures
Monday August 20
Celtic v Dunfermline Athletic - Cappielow Park, 2.00pm
Dundee v St Johnstone - Links Park, 2.00pm
Falkirk v Morton - Falkirk Stadium, 2.00pm
Hibernian v Partick Thistle - Oriam, 2.00pm
Kilmarnock v Hamilton Academical - Rugby Park, 2.00pm
Queen of the South v Rangers - Palmerston Park, 2.00pm
Ross County v Aberdeen - Highland Football Academy, 2.00pm
St Mirren v Dundee United - Simple Digital Arena, 2.00pm
Tuesday August 21
Motherwell v Heart of Midlothian - Forthbank Stadium, 12 noon