Partick Thistle and Dundee United will make history by contesting the first match of the Scottish Professional Football League.
The Firhill fixture has been brought forward to Friday 2 August.
Partick's hosting of Hearts on 16 August and Airdrieonians' Second Division clash with Rangers a week later are the other Friday matches.
Scottish champions Celtic's opening match, against Ross County, now has a 17:15 BST kick-off on 3 August.
The Edinburgh derby scheduled for Saturday 10 August has been put back a day to the Sunday.
In all, 10 matches in August have been rescheduled, with those on 31 August subject to further moves depending on the European results of Scottish teams.