For the Shabbat Mevarchim preceding Rosh Chodesh Iyar — i.e., first Shabbat after the end of the Jewish holiday of Passover — there is a custom of baking schlissel challah ("key challah") as a segula (propitious sign) for parnassa (livelihood).
(see "Iyar in Jewish History" for Iyar 8.)
Iyar - a Hebrew month, which was called Ziv in the Bible
It originates in the Cordillera Real near the peaks of the 6,127 m high Ch'iyar Juqhu which is probably named after the Ch'iyar Juqhu River or the region around it and the 5,871 m high Qalsata flowing down towards the Altiplano.