h ▁Ha Sh an ah . ▁It ▁is ▁a ▁half ▁day ▁fast , ▁meaning ▁it ▁is ▁only ▁observed ▁from ▁dawn ▁of ▁the ▁third ▁day ▁until ▁d usk ▁of ▁that ▁same ▁day . ▁However , ▁when ▁the ▁third ▁of ▁T ish rei ▁falls ▁on ▁Sh abb at , ▁the ▁fast ▁is ▁post pon ed ▁to ▁the ▁fourth ▁day . ▁ ▁After ▁Ros h ▁Hash an ah ▁ends ▁and ▁before ▁Y om ▁K ipp ur ▁starts ▁the ▁next ▁notable ▁day ▁is ▁the ▁special ▁Sh abb at ▁that ▁has ▁its ▁own ▁name ▁Sh abb at ▁Sh uv ah ▁(" S abb ath ▁[ of ] ▁Return ") ▁meaning ▁the ▁S abb ath ▁devoted ▁to ▁" tes hu va " ▁which ▁means ▁" rep ent ance " ▁in ▁J uda ism . ▁▁ ▁The ▁t enth ▁day ▁is ▁the ▁last ▁and ▁it ▁is ▁always ▁the ▁serious ▁Bib lic ally ▁mand ated ▁fast ▁of ▁Y om ▁K ipp ur . ▁ ▁decre es ▁that ▁Y om ▁K ipp ur ▁is ▁a ▁strict ▁day ▁of ▁rest ▁and ▁of ▁fast ing . ▁Y om ▁K ipp ur ▁can ▁also ▁fall ▁out ▁( mean ing ▁be ▁observed ) ▁on ▁a ▁Sh abb at , ▁one ▁of ▁the ▁rare ▁times ▁when ▁fast ing ▁is ▁allowed ▁on ▁that ▁day . ▁Even ▁when ▁it ▁is ▁on ▁a ▁regular ▁week day , ▁Y om ▁K ipp ur ▁is ▁still ▁observed ▁as ▁a ▁" Sh abb at " ▁because ▁in ▁the ▁Tor ah ▁it ▁is ▁referred ▁to ▁as ▁a ▁ ש ב ת ▁ ש ב