Assalamu alikom : For 1st one : come at at least 1:10-1:30 pm ..you wont have space though so you might be outside praying with your own mat. For 2nd one : you should come at 2:15 - 2:30 pm (most of the time 2:20 it starts exactly) but usually you will have good space downstairs if not upstairs. Hope this help.
Salah starts at a variable time but you should be in by 2:10. And by 2:30 pm or so you will exit. Come in at least by 2:00 for start of khutbah. But Space is limited so better to come early.
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