Q: In this task, you are given Wikipedia articles on a range of topics, we ask you to write a question based on the content of the articles that can be answered in a binary manner i.e. True or False.
Sunday -- For most observant Christians, Sunday is observed as a day of worship and rest, holding it as the Lord's Day and the day of Christ's resurrection. In some Muslim countries and Israel, Sunday is the first work day of the week. According to the Hebrew calendar and traditional Christian calendars, Sunday is the first day of the week. But according to the International Organization for Standardization ISO 8601, Sunday is the seventh day of the week.
A:
what day is the first day of the week