Unintended use of week year date format?

[Former user]

The DateUtil class uses "YYYY" to format / parse years. This may yield unexpected dates around year-end, as all days of a week are treated to be part of the same year. Was "yyyy" intended instead?

[Phillip]

Indeed, YYYY format is not giving the wanted results. Code fixed and unit tests added. Resolved in 0.0.7