January 9, 2040 (Monday) to January 15, 2040 (Sunday)
Week 2 of 2040 runs from January 9, 2040 (Monday) to January 15, 2040 (Sunday). This is the 2th week of the year according to the ISO 8601 standard, in which weeks start on Monday.
Jan 9 is a Monday. It is the first day of Week 2 of 2040.
Jan 15 is a Sunday. It is the last day of Week 2 of 2040.
Jan 9 is in Week 2 of 2040 according to ISO 8601.
Jan 15 is in Week 2 of 2040 according to ISO 8601.
Week 2 of 2040 runs from January 9, 2040 to January 15, 2040.
Week 2 of 2040 starts on January 9, 2040, the 9th day of 2040.
Yes, all 7 days of Week 2 of 2040 fall within 2040.
2040 has 52 weeks according to ISO 8601.