In a regular year there are 365 days, so that is 52 weeks and 1 day. In a leap year there are 366 days, so that is 52 weeks and 2 days.
Including January and March, it's 13 weeks. In regular years it is 12 weeks and 6 days, and in leap years it is exactly 13 weeks. If referring to the period from the beginning of January to the beginning of March or from the end of January to the end of March (or middle to middle, etc.), it is eight weeks and three days in regular years and eight weeks and four days in leap years.
Just under 3 years. A year is 52 weeks and a day, a leap year is 52 weeks and 2 days. 156 weeks would be 3 days short of 3 regular years.
1 year = 52 1/7 weeks (not counting leap years) 21 years = 1095 weeks (with some days left over if you are counting leap years) ■
2609 weeks.
Every regular (non-leap) year consists of 52 weeks plus one day.
There are about 208 weeks in 4 years including a leap year but each year has an extra day but a leap year would have two extra days (208 weeks + 6 days about).
It depends on how many leap years are included. There would be 2 on average, but depending on when you start counting there might be three. If there are two leap years, there would be 521 weeks and 5 days.
A regular year is 52 weeks and 1 day. A leap year is 52 weeks and 2 days.
Approx 1983 weeks. The exact number will depend on the number of leap years in the interval.
There are 5 years in 260 weeks, since there are 52 weeks in one year
52 weeks and 2 days. Non-leap years have 365 days, 1 day more than 52 weeks of 7 days each. Leap years have 366 days.
Roughly 2504.6 weeks. The exact number will depend on whether or not there are 12 leap years in that interval.