From acf0378e925f1ffd4a3e39bbc393060635e34984 Mon Sep 17 00:00:00 2001
From: Bryant Austin <bryantaustin13@yahoo.com>
Date: Mon, 26 Oct 2026 14:19:57 -0600
Subject: [PATCH] Keep the fractional execution timezone offset when defaulting
 a DateTime's offset

DateTime.exec filled in a missing timezoneOffset with an Integer literal,
and IntegerLiteral's parseInt dropped the fraction: a +05:30 execution
offset became +05:00. Use a Decimal literal so offset-less DateTime
literals and selectors get the same offset as Now() and ToDateTime(String).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 src/elm/datetime.ts                |  4 ++--
 test/elm/datetime/datetime-test.ts | 26 ++++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/src/elm/datetime.ts b/src/elm/datetime.ts
index c52cf290f..f60468638 100644
--- a/src/elm/datetime.ts
+++ b/src/elm/datetime.ts
@@ -3,7 +3,7 @@ import { build } from './builder';
 import { Literal } from './literal';
 import * as DT from '../datatypes/datatypes';
 import { Context } from '../runtime/context';
-import { ELM_INTEGER_TYPE } from '../util/elmTypes';
+import { ELM_DECIMAL_TYPE } from '../util/elmTypes';
 
 export class DateTime extends Expression {
   json: any;
@@ -35,7 +35,7 @@ export class DateTime extends Expression {
         this[property] = Literal.from({
           type: 'Literal',
           value: ctx.getTimezoneOffset(),
-          valueType: ELM_INTEGER_TYPE
+          valueType: ELM_DECIMAL_TYPE
         });
       }
     }
diff --git a/test/elm/datetime/datetime-test.ts b/test/elm/datetime/datetime-test.ts
index bc35d166e..baa848d30 100644
--- a/test/elm/datetime/datetime-test.ts
+++ b/test/elm/datetime/datetime-test.ts
@@ -102,6 +102,32 @@ describe('DateTime', () => {
     d.millisecond.should.equal(456);
     d.timezoneOffset.should.equalDecimal(-8);
   });
+
+  it('should default to a fractional execution timezone offset', async function () {
+    this.ctx = new PatientContext(
+      this.ctx.library,
+      this.ctx.patient,
+      this.ctx.codeService,
+      this.ctx.parameters,
+      DT.DateTime.fromJSDate(new Date(), 5.5)
+    );
+    const d = await this.minute.exec(this.ctx);
+    d.minute.should.equal(10);
+    d.timezoneOffset.should.equalDecimal(5.5);
+  });
+
+  it('should default to a negative fractional execution timezone offset', async function () {
+    this.ctx = new PatientContext(
+      this.ctx.library,
+      this.ctx.patient,
+      this.ctx.codeService,
+      this.ctx.parameters,
+      DT.DateTime.fromJSDate(new Date(), -9.5)
+    );
+    const d = await this.minute.exec(this.ctx);
+    d.minute.should.equal(10);
+    d.timezoneOffset.should.equalDecimal(-9.5);
+  });
 });
 
 describe('Time', () => {