December 29, 2036 (Monday) to January 4, 2037 (Sunday)
Week 1 of 2037 runs from December 29, 2036 (Monday) to January 4, 2037 (Sunday). This is the 1th week of the year according to the ISO 8601 standard, in which weeks start on Monday.
Dec 29 is a Monday. It is the first day of Week 1 of 2037.
Jan 4 is a Sunday. It is the last day of Week 1 of 2037.
Dec 29 is in Week 1 of 2037 according to ISO 8601.
Jan 4 is in Week 1 of 2037 according to ISO 8601.
Week 1 of 2037 runs from December 29, 2036 to January 4, 2037.
Week 1 of 2037 starts on December 29, 2036, the 364th day of 2036.
Yes, all 7 days of Week 1 of 2037 fall within 2037.
2037 has 53 weeks according to ISO 8601.