Implemented suggested change by @tonygermano

Signed-off-by: Nico Piel <nico.piel@hotmail.de>

Author: NicoPiel

server/src/com/mirth/connect/client/core/api/providers/CalendarParamConverterProvider.java

@@ -43,10 +43,8 @@ public T fromString(String value) {
                         // Parse the incoming string as a ZonedDateTime using the given pattern
                         ZonedDateTime zdt = ZonedDateTime.parse(value, FORMATTER);
 
-                        // Convert to a Calendar in the same zone
-                        Calendar calendar = Calendar.getInstance();
-                        calendar.setTime(Date.from(zdt.toInstant()));
-                        calendar.setTimeZone(java.util.TimeZone.getTimeZone(zdt.getZone()));
+                        Calendar calendar = Calendar.getInstance(java.util.TimeZone.getTimeZone(zdt.getZone()));
+                        calendar.setTimeInMillis(zdt.toInstant().toEpochMilli());
 
                         @SuppressWarnings("unchecked")
                         T result = (T) calendar;