As most of us know, each month has a combination of the holy name YHWH - that's 3 letters YHW times 4 places gives 12 combinations. It is intended to be kept in mind while saying the Brocho of Musaf for every Rosh Chodesh.
The reverse name (ונהפוך הוא) is HWHY and a Pasuk it is learned from is "זה איננו שווה לי" - that's the last letters abbreviation - the Posuk from Meggilat Ester.
We would all expect those letters would stand for the month of Adar but... No, it stands for Tamuz instead.
Please explain how it relates to Tamuz and not Adar.
Here's a page of an "Ar"i Siddur":