fix implicit date parsing from numbers (#22158)

* check ci

* add test-case

* apply iso format only to numbers

frontend/src/metabase/lib/time.js

@@ -93,6 +93,8 @@ export function parseTimestamp(value, unit = null, local = false) {
     m = TEXT_UNIT_FORMATS[unit](value);
   } else if (unit in NUMERIC_UNIT_FORMATS && typeof value == "number") {
     m = NUMERIC_UNIT_FORMATS[unit](value);
+  } else if (typeof value === "number") {
+    m = moment.utc(value, moment.ISO_8601);
   } else {
     m = moment.utc(value);
   }

frontend/test/metabase/lib/time.unit.spec.js

@@ -21,6 +21,7 @@ describe("time", () => {
       ["2015-01-01T00:00:00.000+00:00", 0, NY15_UTC],
       ["2015-01-01T00:00:00.000+0000", 0, NY15_UTC],
       ["2015-01-01T00:00:00Z", 0, NY15_UTC],
+      [2015, 0, NY15_UTC],
 
       ["2015-01-01T00:00:00.000+09:00", 540, NY15_TOKYO],
       ["2015-01-01T00:00:00.000+0900", 540, NY15_TOKYO],