So, the question says how many weeks are there in a year. As we all know there are about 365,242 days in a year. According to the Gregorian calendar, 1 year is equivalent to 365 days but in the astronomical calendar 6hours and 4years once in February was added. So, in a year there are about 52 weeks.
Generally, in a year there are approximately 52 weeks but leap year occurs every 4year so, in a leap year there are about 52weeks in addition to 2 days in a year. A calendar year starts in January and ends in the month of December. Now there are different calculations of the number of days, weeks in a year. If the first day of January is on Saturday then next week will begin on the second day of January. If it is a leap year then the last day of December can also be a new week. So, there are more than 52 weeks in a year i.e 52 weeks and 1day in case of a non-leap year and 52weeks 2days in case of a leap year. These are an extra one or two days that make an extra week in a year though it’s an incomplete week. 2021 is not a leap year so, the current week number 2021 says that there are about 52 weeks 1day in this year as the year starts on 1st January which is Friday and also ends on Friday which is 31st of December. This describes how many weeks in a year and how it’s calculated.
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