Add Hebrew calendar for ancient Israel and Judea

d0ec61d667ea77626f2f52b96d52b563a548cc07 · Pavel Safronov · 2026-06-20 22:40:31 -0700 · parents 429842aaf224

Add Hebrew calendar for ancient Israel and Judea

Uses the existing Hebrew (Temporal-backed) converter; the region covers
the historic Levant heartland and the era is left open-ended since the
calendar remains in everyday religious use and is official in Israel today.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

 screenshots/calendars/judea/01-hebrew.png | Bin 0 -> 860531 bytes
 src/data/calendars/judea.json             |  36 ++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/screenshots/calendars/judea/01-hebrew.png b/screenshots/calendars/judea/01-hebrew.png
new file mode 100644
index 0000000..a79d4b6
Binary files /dev/null and b/screenshots/calendars/judea/01-hebrew.png differ
diff --git a/src/data/calendars/judea.json b/src/data/calendars/judea.json
new file mode 100644
index 0000000..1e62646
--- /dev/null
+++ b/src/data/calendars/judea.json
@@ -0,0 +1,36 @@
+{
+    "region": {
+        "name": "Ancient Israel and Judea (historic Levant)",
+        "geo": {
+            "type": "Polygon",
+            "coordinates": [
+                [
+                    [34.2, 33.3],
+                    [35.2, 33.3],
+                    [35.9, 32.7],
+                    [35.9, 31.5],
+                    [35.6, 30.6],
+                    [34.9, 29.5],
+                    [34.2, 30.0],
+                    [34.2, 31.3],
+                    [34.2, 33.3]
+                ]
+            ]
+        }
+    },
+    "eras": [
+        {
+            "name": "Hebrew calendar (observational, then fixed)",
+            "start": null,
+            "end": null,
+            "calendar": "Hebrew",
+            "usedBy": "the Jewish people",
+            "description": "A lunisolar calendar used by the Jewish people since ancient times in Israel and Judea; the Gezer calendar (c. 10th century BCE) is an early possible artifact. Originally each month began on observation of the new moon and leap months were declared by observing agricultural conditions; between roughly 70 and 1178 CE these empirical rules were gradually replaced by fixed mathematical reckoning (the calendar was essentially fixed by the 4th century CE). Years are counted Anno Mundi (AM), traditionally from one year before the Creation (the molad epoch corresponds to Sunday, 6 October 3761 BCE proleptic Gregorian). The calendar remains in everyday religious use worldwide and is an official calendar of the State of Israel today, so this era is left open-ended.",
+            "sources": [
+                "https://en.wikipedia.org/wiki/Hebrew_calendar",
+                "https://en.wikipedia.org/wiki/Gezer_calendar",
+                "https://en.wikipedia.org/wiki/Ancient_Israel_and_Judah"
+            ]
+        }
+    ]
+}