{"id":35612,"date":"2023-12-14T08:30:39","date_gmt":"2023-12-14T06:30:39","guid":{"rendered":"https:\/\/shanky.staging24.link\/?post_type=product&#038;p=35612"},"modified":"2026-10-27T05:19:49","modified_gmt":"2026-10-27T03:19:49","slug":"zmanim","status":"publish","type":"product","link":"https:\/\/www.shankysjudaica.com\/en\/product\/zmanim\/","title":{"rendered":"Zmanim"},"content":{"rendered":"<div dir=\"ltr\" style=\"text-align:left;\">\n<p>How did the Jewish calendar come to be? Why are there sometimes two days of Rosh Chodesh and sometimes not? Who keeps Yom Tov for two days? Why are some parshiyos read together? What do Chazal have to say about the International Date Line? Which halachos apply when there is an eclipse? Does the \u201cMagen Avraham\u2019s z\u2019man for k\u2019rias Shema\u201d really exist? Why do we wait for Rabbeinu Tam (and why is he always late)?<\/p>\n<p>While all of us are familiar with and use the Jewish calendar, there is much about it that lies beneath the surface. Explorations in the Jewish Calendar is the culmination of twenty years of research in the mechanics of the Jewish calendar and the halachos of the daily z\u2019manim. For the first time, these complicated topics are presented to inquisitive readers in clear, easy-to-understand English.<\/p>\n<p>Rabbi Moshe Ze&#x27;ev Granek is the author of four books, including a multi-volume commentary on the Sefer Hamitzvos of the Rambam. In addition to researching the topic of the Jewish calendar for over twenty years, he is, at present, a member of the kollel of the Bais Havaad of Lakewood, NJ, which specializes in topics of Choshen Mishpat. He lives in Jackson, NJ.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>How did the Jewish calendar come to be? Why are there sometimes two days of Rosh Chodesh and sometimes not? Who keeps Yom Tov for two days? Why are some parshiyos read together? What do Chazal have to say about the International Date Line? Which halachos apply when there is an eclipse? Does the \u201cMagen [&hellip;]<\/p>\n","protected":false},"featured_media":2341576,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[460,463,461],"product_tag":[],"class_list":["post-35612","product","type-product","status-publish","has-post-thumbnail","product_cat-english","product_cat-halacha-sifrei-kodesh","product_cat-sifrei-kodesh","first","instock","shipping-taxable","purchasable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Zmanim - \u05e9\u05e0\u05e7\u05d9\u05e1 \u2022 Shanky&#039;s<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.shankysjudaica.com\/en\/product\/zmanim\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Zmanim - \u05e9\u05e0\u05e7\u05d9\u05e1 \u2022 Shanky&#039;s\" \/>\n<meta property=\"og:description\" content=\"How did the Jewish calendar come to be? Why are there sometimes two days of Rosh Chodesh and sometimes not? Who keeps Yom Tov for two days? Why are some parshiyos read together? What do Chazal have to say about the International Date Line? Which halachos apply when there is an eclipse? Does the \u201cMagen [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.shankysjudaica.com\/en\/product\/zmanim\/\" \/>\n<meta property=\"og:site_name\" content=\"\u05e9\u05e0\u05e7\u05d9\u05e1 \u2022 Shanky&#039;s\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-27T03:19:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.shankysjudaica.com\/wp-content\/uploads\/2026\/09\/79406.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"300\" \/>\n\t<meta property=\"og:image:height\" content=\"449\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.shankysjudaica.com\\\/product\\\/zmanim\\\/\",\"url\":\"https:\\\/\\\/www.shankysjudaica.com\\\/product\\\/zmanim\\\/\",\"name\":\"Zmanim - \u05e9\u05e0\u05e7\u05d9\u05e1 \u2022 Shanky&#039;s\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.shankysjudaica.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.shankysjudaica.com\\\/product\\\/zmanim\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.shankysjudaica.com\\\/product\\\/zmanim\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.shankysjudaica.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/79406.jpg\",\"datePublished\":\"2023-12-14T06:30:39+00:00\",\"dateModified\":\"2026-10-27T03:19:49+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.shankysjudaica.com\\\/product\\\/zmanim\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.shankysjudaica.com\\\/product\\\/zmanim\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.shankysjudaica.com\\\/product\\\/zmanim\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.shankysjudaica.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/79406.jpg\",\"contentUrl\":\"https:\\\/\\\/www.shankysjudaica.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/79406.jpg\",\"width\":300,\"height\":449},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.shankysjudaica.com\\\/product\\\/zmanim\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.shankysjudaica.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Shop\",\"item\":\"https:\\\/\\\/www.shankysjudaica.com\\\/shop\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Zmanim\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.shankysjudaica.com\\\/#website\",\"url\":\"https:\\\/\\\/www.shankysjudaica.com\\\/\",\"name\":\"\u05e9\u05e0\u05e7\u05d9\u05e1 \u2022 Shanky&#039;s\",\"description\":\"\u05de\u05d1\u05d7\u05e8 \u05e2\u05e0\u05e7 \u05e9\u05dc \u05e1\u05e4\u05e8\u05d9 \u05e7\u05e8\u05d9\u05d0\u05d4 \u05d5\u05e7\u05d5\u05d3\u05e9 \u05d1\u05de\u05d7\u05d9\u05e8\u05d9\u05dd \u05d4\u05db\u05d9 \u05d8\u05d5\u05d1\u05d9\u05dd \u05e9\u05ea\u05de\u05e6\u05d0\u05d5\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.shankysjudaica.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.shankysjudaica.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.shankysjudaica.com\\\/#organization\",\"name\":\"\u05e9\u05e0\u05e7\u05d9\u05e1 \u2022 Shanky&#039;s\",\"url\":\"https:\\\/\\\/www.shankysjudaica.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.shankysjudaica.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.shankysjudaica.com\\\/wp-content\\\/uploads\\\/2023\\\/11\\\/shankisLogo.png\",\"contentUrl\":\"https:\\\/\\\/www.shankysjudaica.com\\\/wp-content\\\/uploads\\\/2023\\\/11\\\/shankisLogo.png\",\"width\":193,\"height\":76,\"caption\":\"\u05e9\u05e0\u05e7\u05d9\u05e1 \u2022 Shanky&#039;s\"},\"image\":{\"@id\":\"https:\\\/\\\/www.shankysjudaica.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Zmanim - \u05e9\u05e0\u05e7\u05d9\u05e1 \u2022 Shanky&#039;s","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.shankysjudaica.com\/en\/product\/zmanim\/","og_locale":"en_US","og_type":"article","og_title":"Zmanim - \u05e9\u05e0\u05e7\u05d9\u05e1 \u2022 Shanky&#039;s","og_description":"How did the Jewish calendar come to be? 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