I have no idea how these apps were calculating date display. I am a Canadian (in their settings), who was logged in via a VPN from I think the Netherlands, with a phone that was time synced to Kenya. Screenshots from iPhone August 2019.
Apps
- Facebook messenger
- Apple messages
- Gmail
- Skype
- Zoom
- Apple photos
- Google photos
- Amazon
- Apple credit card
- Apple health
- Evernote
- Google news
- Audible
- Google analytics
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Tickets
Mostly from airlines
- AirCanada
- Emirates
- FlightNetwork
- JamboJet
- Lufthansa
- United
- Westjet
- Amtrack
- Booking.com
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Google Flights Screenshots
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From the series Building the EHR
Section: Conventions / Date Display