January 19, 2043 (Monday) to January 25, 2043 (Sunday)
Week 4 of 2043 runs from January 19, 2043 (Monday) to January 25, 2043 (Sunday). This is the 4th week of the year according to the ISO 8601 standard, in which weeks start on Monday.
Jan 19 is a Monday. It is the first day of Week 4 of 2043.
Jan 25 is a Sunday. It is the last day of Week 4 of 2043.
Jan 19 is in Week 4 of 2043 according to ISO 8601.
Jan 25 is in Week 4 of 2043 according to ISO 8601.
Week 4 of 2043 runs from January 19, 2043 to January 25, 2043.
Week 4 of 2043 starts on January 19, 2043, the 19th day of 2043.
Yes, all 7 days of Week 4 of 2043 fall within 2043.
2043 has 53 weeks according to ISO 8601.