şabat kün

/ ʃabat kyn /

Cases

SingularPluralWhen to use it
nominative şabat kün the Saturday şabat künle the Saturdays the plain dictionary form — the doer of the sentence
genitive şabat künnü the Saturday's şabat künleni the Saturdays' the owner — whose it is
accusative şabat künnü the Saturday (as the object) şabat künleni the Saturdays (as the object) a specific, known object — whom or what
dative şabat künge to the Saturday şabat künlege to the Saturdays direction or recipient — to where, to whom
locative şabat künde at / in the Saturday şabat künlede at / in the Saturdays where it is; also having — mende bar, "I have it"
ablative şabat künden from the Saturday şabat künleden from the Saturdays where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
my şabat künüm my Saturday şabat künlerim my Saturdays
your şabat kününg your Saturday şabat künlering your Saturdays
his / her şabat künü his / her Saturday şabat künleri his / her Saturdays
our şabat künübüz our Saturday şabat künleribiz our Saturdays
you all's şabat künügüz you all's Saturday şabat künlerigiz you all's Saturdays
their şabat künleri their Saturday şabat künleri their Saturdays

The overlap in the last rows is real, not a mistake: şabat künleri can mean "his / her Saturdays", "their Saturday", or "their Saturdays" — context decides.