1 files changed, 22 insertions, 0 deletions
diff --git a/src/IOL.Helpers/DateTimeHelpers.cs b/src/IOL.Helpers/DateTimeHelpers.cs
new file mode 100644
index 0000000..07e951e
--- /dev/null
+++ b/src/IOL.Helpers/DateTimeHelpers.cs
@@ -0,0 +1,22 @@
+using System;
+
+namespace IOL.Helpers
+{
+	public static class DateTimeHelpers
+	{
+		public static DateTime ToTimeZoneId(this DateTime value, string timeZoneId) {
+			try {
+				var cstZone = TimeZoneInfo.FindSystemTimeZoneById(timeZoneId);
+				return TimeZoneInfo.ConvertTimeFromUtc(value, cstZone);
+			} catch (TimeZoneNotFoundException) {
+				Console.WriteLine("The registry does not define the " + timeZoneId + " zone.");
+				return default;
+			} catch (InvalidTimeZoneException) {
+				Console.WriteLine("Registry data on the " + timeZoneId + " zone has been corrupted.");
+				return default;
+			}
+		}
+
+		public static DateTime ToOsloTimeZone(this DateTime value) => ToTimeZoneId(value, "Europe/Oslo");
+	}
+}
+\ No newline at end of file