How about short version of days and months?
D A textual representation of a day, three letters Mon through Sun
M A short textual representation of a month, three letters Jan through Dec
You can still use formatLocalized method of this class, which uses PHP function strftime inside, which is locale-aware and supports shortened representations of months and week-days.
See strftime with addition of %f key - wich is month in genitive.
How about short version of days and months? D A textual representation of a day, three letters Mon through Sun M A short textual representation of a month, three letters Jan through Dec
And even shorter days: Пн, Вт, Ср, Чт, Пт, Сб, Вс