Please go to Administrator Panel >> Template manager >> sj_time-default

Open “Layout” tab >> Find “Layout select” to know the layout which you are using

For Example: Layout of SJ Time Template is “layout1”

Then open “templates” folder and choose “sj_time” folder

Open “Layouts” folder and choose “layout1.xml”

Next, please add “hidden-xs” – if you want to hide a position in mobile of add “hidden-sm” – if you want to hide a position in tablet

Show a position in mobile or tablet layout.

Hide a position in mobile or tablet layout.

Finally, Click the “Save” button and refresh your site.