856: fixed Etc/GMT0 yields Invalid DateTime (#897)

moment · May 8, 2021 · c34afb1 · c34afb1
1 parent 2d36a9c
commit c34afb1
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Showing 2 changed files with 4 additions and 1 deletion.
diff --git a/src/zones/IANAZone.js b/src/zones/IANAZone.js
@@ -109,7 +109,7 @@ export default class IANAZone extends Zone {
   /** @ignore */
   static parseGMTOffset(specifier) {
     if (specifier) {
-      const match = specifier.match(/^Etc\/GMT([+-]\d{1,2})$/i);
+      const match = specifier.match(/^Etc\/GMT(0|[+-]\d{1,2})$/i);
       if (match) {
         return -60 * parseInt(match[1]);
       }

diff --git a/test/zones/IANA.test.js b/test/zones/IANA.test.js
@@ -33,6 +33,9 @@ test("IANAZone.isValidZone", () => {
 
 test("IANAZone.parseGMTOffset returns a number for a valid input", () => {
   expect(IANAZone.parseGMTOffset("Etc/GMT+8")).toBe(-480);
+  expect(IANAZone.parseGMTOffset("Etc/GMT+0")).toBe(-0);
+  expect(IANAZone.parseGMTOffset("Etc/GMT-0")).toBe(+0);
+  expect(IANAZone.parseGMTOffset("Etc/GMT0")).toBe(-0);
 });
 
 test("IANAZone.parseGMTOffset returns null for invalid input", () => {