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rayraybrubru Chodesh tov! Are people calling Purim a spring holiday? Pesach is in “chodesh ha’aviv”, which is what we call Nisan these days, and Adar is always before Nisan.
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rayraybrubru The Hebrew calendar also has long term drift. It’s getting later and later with respect to the vernal equinox. It’s getting about a day later every 200 years.
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rayraybrubru You can see this on isyontefearlythisyear.com because the earliest dates only occurred in the past, and the latest dates will only occur in the future