Federal law sets baseline quiet hours of 8:00am–9:00pm at the contact’s local time, seven days a week. Read 47 U.S.C. § 227, the FCC’s implementing rules at 47 CFR § 64.1200, and the FTC Telemarketing Sales Rule, 16 CFR Part 310.
Drop Cowboy automatically holds sends until federal hours — and any stricter state window — allow them. You still collect consent, honor opt-outs, and decide when holidays or emergencies mean you should not send at all.