Didn’t know that TX has (special) elections on a Saturday too, like LA ...
Texas has uniform election dates when local governments are required to hold elections. There used to four during the year, February, May, September, and November. Only the November election was on a Tuesday, imposed by the Northern hegemons.
The others were on Saturday, as were the primaries and primary runoff. Voters could come to town for shopping and also vote. Texas requires that special elections be held on the next uniform election date, unless it is contested as an emergency.
When the primaries were moved to March they messed up and moved them to Tuesday.