Issue

Greek (el) months are written wrong. Month name must be in genitive grammatical case.

Issue example

To reproduce this issue I will use parser function #time with date "November 23, 2015"

For example, parser function {{#time: d F Y | 2015-11-23 | el }} returns:

23 Νοέμβριος 2015 (simulated result - for actual result see here)

while it should have been:

23 Νοεμβρίου 2015

Issue explanation

When a date is written in Greek, month must be in genitive grammatical case (genitive = possessive = of something, for example: 23 Νοεμβρίου = 23 of November), otherwise it makes no sense in Greek, as "23 November" makes no sense in English.

Note that this only applies in case of day+month rendering. If there is a month-only rendering then month must be as is, in the usual nominative grammatical case.

Genitive case month strings do exist in MediaWiki (e.g. MediaWiki:November-gen/el) and they are properly used in all MediaWiki logs, but they don't seem to be used by #time.

MediaWiki has come a long way and now, and by use of grammar, plural and gender, its messages have become more intuitive and user friendly than ever. This issue is a relic of old times and must be eliminated.