Reply To: Time to reinvent clock

to all the learned posters. shittot where chatzot does not occur at the exact astronomical point of midday have a complex halakhic history. there are at least three reasons that underlie this phenomenon. individuals like rav nosson Adler ztl, the CS ztl’s rebbe, RYCS ztl, RSZA ztl, RMF ztl maintained such a position. it was also minhag yerushalayim in the 19th century. to understand it requires a long shiur in zemanim. most poskim reject the shittah despite the many who in one way or another upheld it. even the minchat yitzchok forcefully rejects it despite its prevalence in the early yishuv.