How about some calendaring issues I'm sure any Israeli is familiar with:
1. Weeks start on Monday.
2. Days begin in the morning.
3. Re: 2, holidays span an integer number of whole days.
Explanations:
1: In Israel, the week starts on Sunday. Most programs have support for changing the "start of week day". Most programs.
2-3: In the Jewish calendar, the day starts when the moon comes out. This means that holidays that most calendars write as "Wednesday" will actually start on Tuesday night, and last until Wednesday night.
Or anyone living in the Arab Middle East where:
1. Weeks start on a Sunday
2. Friday and Saturday are the weekend, except where it's Thursday and Friday
3. Some countries have changed their weekends in the last 10 years to Fri/Sat to make doing business internationally easier
4. Not everyone has a two-day weekend
5. Religious holidays depend on moon sightings and cannot be precisely predicted ahead of time
Actually, in Jewish tradition, children are taught that the day begins at sunset. The justification comes from Genesis... "And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day."
1. Weeks start on Monday.
2. Days begin in the morning.
3. Re: 2, holidays span an integer number of whole days.
Explanations:
1: In Israel, the week starts on Sunday. Most programs have support for changing the "start of week day". Most programs.
2-3: In the Jewish calendar, the day starts when the moon comes out. This means that holidays that most calendars write as "Wednesday" will actually start on Tuesday night, and last until Wednesday night.