D3 Time Format Skips Isoweek

When using d3.time.format(%Y%W) it doesn't give the expected output. d3.time.format('%Y%W').parse('201553') outputs Mon Jan 04 2016 Although the first Monday of week number 53 in

Solution 1:

The number of weeks is zero-based. d3.time.format defines a week number that is different from ISO 8601.

Check the documentation: https://github.com/d3/d3/wiki/Time-Formatting

%W - week number of the year (Monday as the first day of the week) as a decimal number [00,53].

It's the same for %U:

%U - week number of the year (Sunday as the first day of the week) as a decimal number [00,53].