Don’t Let Time Zones Ruin Your Day(s)

Detailed image description of the sketchnote

• Days since last timezone issues -1

About Please Don’t Rain app

• Please don’t rain when I want to go to the theme park
• Weather for a different place
• Track time until x

Options

• TimestampSince1970
• Calendar
• Date formats
• Format style

• Calendric Fallacy website shout out
• UTC offsets can contain minutes! (Lord Howe Island)
• Watch out: "Problems can be subtle"
• Calendar.current (timezone from device settings) -> solution: hardcode calendar with custom timezone and custom FormatStyle
• Assume nothing
• Test everything
• Timezones are a nightmare