Incorrect automatic time zone

I've noticed that the automatic time zone detection functionality of my GNOME 3 (Arch Linux) is not working correctly. My actual time zone is PST (UTC-08), but if I toggle on the "Automatic Time Zone" option in "All Settings -> Date & Time", it would detect me to be in EST (UTC-05). Kernel: 4.9.11-1-ARCH GNOME: 3.22.3-1 Output of timedatectl: Local time: Wed 2017-03-01 05:36:18 EST Universal time: Wed 2017-03-01 10:36:18 UTC RTC time: Wed 2017-03-01 10:36:18 Time zone: America/New_York (EST, -0500) Network time on: yes NTP synchronized: yes RTC in local TZ: no Output of sudo hwclock --show: 2017-03-01 05:37:38.295861-0500 (Which is the current EST time) Output of date: Wed Mar 1 05:39:07 EST 2017 I suspected it was something wrong with my IP address, but all online IP location finder websites I've tried tell me I'm in San Francisco (which is correct). Also, I'm running dual systems (Windows 10 & Arch), and one OS writing the hardware clock always results in the other OS having an incorrect time on the next boot; I just ignore it and let the OSes' internet time services correct it. Wrong time zone detection only began today. I'm not sure how to approach this issue. Can anyone shed some light on what might be the cause?