Strike Eagle. Days vary significantly based on the sched. Generally: Show up, prep as required, brief, put on gear, fly, debrief, go home, or have a drink in the squadron bar. Sometimes it's a desk duty instead, like briefing the crews who fly and doing coord with maintenance, or sitting in the ATC tower and coording emergencies, weather contingencies etc. Sometimes it's a sim (realistic video game with full mockup cockpit) Sometimes its meetings, academics, training etc. You generally have a desk job too that you change out once a year or so, but many of those are being supplemented by civilians who do it full time.
Unfortunately, the computers used for the desk jobs are horrendously broken. Ie, takes ~30 mins to go from log-on to getting email up; everything has a long response time. Opening a PDF to sign or fill out takes 1-3 minutes or so each.