**Packages**- time

Get the number of the Sunday-starting week in the year and the day of the week. The first Sunday is the first day of week 1, any earlier days in the year are week 0 (as "%U" in formatTime). Sunday is 0, Saturday is 6 (as "%w" in formatTime).

The inverse of sundayStartWeek. Get a Day given the year and the number of the day of a Sunday-starting week. The first Sunday is the first day of week 1, any earlier days in the year are week 0 (as "%U" in formatTime).