Selector de fecha y selector de semana

[Juan_Antonio]

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When the first week of the year begins. ISO8601. JavaScript

The ISO 8601 definition for week 01 is the week with the first Thursday of the Gregorian year If 1 January is on a Monday, Tuesday, Wednesday or Thursday, it is in W01. If it is on a Friday, it is part of W53 of the previous year. If it is on a Saturday, it is part of the last week of the previous year which is numbered W52 in a common year and W53 in a leap year. If it is on a Sunday, it is part of W52 of the previous year. https://en.wikipedia.org/wiki/ISO_week_date What is the first day of…