Date element %y uses century parser %C instead of actual implementation

[ohaibbq]

From the docs, %y is as follows:

The year without century as a decimal number (00-99), with an optional leading zero. Can be mixed with %C. If %C is not specified, years 00-68 are 2000s, while years 69-99 are 1900s.

The note about %C in the documentation refers to how to interpret the results of %y rather than saying that it is an alias of the element