January 13, 2042 (Monday) to January 19, 2042 (Sunday)
Week 3 of 2042 runs from January 13, 2042 (Monday) to January 19, 2042 (Sunday). This is the 3th week of the year according to the ISO 8601 standard, in which weeks start on Monday.
Jan 13 is a Monday. It is the first day of Week 3 of 2042.
Jan 19 is a Sunday. It is the last day of Week 3 of 2042.
Jan 13 is in Week 3 of 2042 according to ISO 8601.
Jan 19 is in Week 3 of 2042 according to ISO 8601.
Week 3 of 2042 runs from January 13, 2042 to January 19, 2042.
Week 3 of 2042 starts on January 13, 2042, the 13th day of 2042.
Yes, all 7 days of Week 3 of 2042 fall within 2042.
2042 has 52 weeks according to ISO 8601.