Hello,
I've tracked and fixed the problem with month and weekday display in Meetings. I'm attaching fixed MeetingsCommon, to be placed in modules/CRM/Meetings/.
As for the source column in notes aggregate - it's an issue that goes beyond translations alone and to fix that, a script execution will also be required, to alter the database and fix some entries there. I'm afraid I won't be able to provide a quickfix for this one, but I'll do my best to make sure it's included in the next release.
Kind regards,
Arek