{"id":113223,"date":"2026-10-09T16:54:24","date_gmt":"2026-10-09T14:54:24","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=113223"},"modified":"2026-10-09T20:34:58","modified_gmt":"2026-10-09T18:34:58","slug":"eternal-disk-calendar-according-to-historical-example-hemisphere","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/eeuwigdurende-schijfkalender-naar-historisch-voorbeeld-hemisferium\/","title":{"rendered":"Eternal disk calendar based on historical example | Hemisferium"},"content":{"rendered":"<p class=\"wp-block-paragraph\">On which day did your birthday fall, or on which weekday will Christmas be in three years? A perpetual calendar gives you the answer without a phone. With this disc calendar from Hemisferium, you set the rotation discs to which weekday a date falls, year after year again.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Such calendars were already being made long before you could find them on your phone in a few seconds. Hemisferium makes replicas of historical scientific instruments, and this calendar fits into that line: an object for your desk that you actually use.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A gift for anyone who loves timekeeping and old instruments. If the recipient also follows the moon, then it will suit them. <a href=\"https:\/\/www.telescoop.nl\/en\/lunar-calendar-and-tide-counter-according-to-historical-example-12-cm-hemisphere\/\">The historical lunar calendar with tide calculation<\/a> Here you go. The sculpture pieces of this month can be seen in <a href=\"https:\/\/www.telescoop.nl\/en\/moon-calendar\/\">our lunar calendar<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Disk calendar based on historical example that does not adhere to a single year. Use the rotary dials to find out which weekday a date falls on.<\/p>","protected":false},"featured_media":113221,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[3286],"product_cat":[3272],"product_tag":[],"class_list":["post-113223","product","type-product","status-publish","has-post-thumbnail","product_brand-hemisferium","product_cat-geschenken","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"bundled_by":[],"bundle_stock_status":"instock","bundle_stock_quantity":null,"bundle_virtual":false,"bundle_layout":"","bundle_add_to_cart_form_location":"","bundle_editable_in_cart":false,"bundle_sold_individually_context":"","bundle_item_grouping":"","bundle_min_size":"","bundle_max_size":"","bundle_price":[],"bundled_items":[],"bundle_sell_ids":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":113261,"url":"https:\/\/www.telescoop.nl\/en\/maankalender-en-getijdenrekenaar-naar-historisch-voorbeeld-12-cm-hemisferium\/","url_meta":{"origin":113223,"position":0},"title":"Lunar calendar and tide counter according to historical example, 12 cm | Hemisferium","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"12 cm sundial to a historical example that shows how the age of the moon determines the time of high tide.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/91063_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/91063_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/91063_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113252,"url":"https:\/\/www.telescoop.nl\/en\/zonnekompas-replica-naar-historisch-voorbeeld-hemisferium\/","url_meta":{"origin":113223,"position":1},"title":"Sun compass, replica according to historical example | Hemisferium","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"A replica of a historical solar compass that shows how the position of the sun, the wind directions and the time are interconnected.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/75519_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/75519_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/75519_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113215,"url":"https:\/\/www.telescoop.nl\/en\/ringzonnewijzer-replica-van-een-draagbare-historische-zonnewijzer-hemisferium\/","url_meta":{"origin":113223,"position":2},"title":"Ring sundial, replica of a portable historical sundial | Hemisferium","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Portable sundial in the form of a ring, following a historical example. A decorative and educational gift for lovers of old instruments.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44746_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44746_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44746_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113237,"url":"https:\/\/www.telescoop.nl\/en\/sextant-replica-van-het-navigatie-instrument-hemisferium\/","url_meta":{"origin":113223,"position":3},"title":"Sextant, replica of the navigation instrument | Hemisferium","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Replica of a sextant, the navigation instrument with which sailors used mirrors to measure the angle between the horizon and a celestial body.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/69616_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/69616_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/69616_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113239,"url":"https:\/\/www.telescoop.nl\/en\/kwadrant-van-beringer-replica-hemisferium\/","url_meta":{"origin":113223,"position":4},"title":"Beringer quadrant, replica | Hemisferium","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Replica of the quadrant of Beringer, a historical instrument in the form of a quarter circle to measure the height of celestial bodies.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/69617_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/69617_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/69617_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113217,"url":"https:\/\/www.telescoop.nl\/en\/zeevaartastrolabium-om-de-breedtegraad-te-bepalen-replica-hemisferium\/","url_meta":{"origin":113223,"position":5},"title":"Seamarine astrolabe to determine the latitude, replica | Hemisferium","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Replica of the astrolabe with which sailors measured the height of the sun or a star to determine the latitude at which they were sailing.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44747_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44747_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44747_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/113223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/comments?post=113223"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/113221"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=113223"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=113223"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=113223"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=113223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}