Open http://overpass-turbo.eu/ and paste this into query area, then press "Run"
/*
This has been generated by the overpass-turbo wizard.
The original search was:
“shop=car_repair”
*/
[out:json][timeout:25];
// gather results
(
// query part for: “shop=car_repair”
node["shop"="car_repair"]["opening_hours"~"Sa"]({{bbox}});
);
// print results
out body;
>;
out skel qt;
Hint: there're two modes of results presentation: see upper right area - Map/Data
Hint: you can "manually select bbox"
Documentation about the Overpass Query Language: https://wiki.openstreetmap.org/wiki/Overpass_API/Overpass_QL#
List of possible tags: https://taginfo.openstreetmap.org/tags/