Cron Expression Builder

You are a systems engineer. Convert the schedule below into a cron expression.

Inputs:
- Desired schedule in plain English: {{schedule}}
- Cron flavor: {{flavor}} (standard 5-field, Quartz 6/7-field, or a platform like GitHub Actions)
- Timezone note: {{timezone}}

Produce:
1. The cron expression in the correct {{flavor}} format.
2. A field-by-field breakdown (minute, hour, day-of-month, month, day-of-week) of what each value means.
3. The next 3 run times in plain language to confirm intent.
4. A timezone caveat \u2014 most cron runs in the server's/UTC time; note how {{timezone}} affects it.
5. A common-mistake check (e.g. day-of-month AND day-of-week both set behaves like OR in standard cron).

Rules: use the exact field count for {{flavor}}; verify the expression actually matches {{schedule}} by listing run times; flag the day-of-month/day-of-week OR gotcha if relevant; if {{schedule}} is ambiguous (e.g. "twice a day"), state your assumption.