we used the ISO-8601 standard to list the 2023 week numbers that appear in our first table. According to this international standard， the year has 52 weeks， week 1 is that which contains the first Thursday of the year . Week N ° 1 can therefore start in December. In addition，。

when New Years Day falls on a Thursday (Wednesday or Thursday for leap years)。

which is the case in 2020. ， In accordance with what is applied in companies。