Support timezone conversion on date fields

product/Formulator/Widget.py

@@ -1368,7 +1368,8 @@ class DateTimeWidget(Widget):
   default_timezone = fields.ListField('default_timezone',
                                   title="Default Timezone",
                                   description=(
-      "The default timezone display when inputing a new date"),
+      "The default timezone display when inputing a new date."
+      "Upon display, the dates are converted to this timezone"),
                                   default="",
                                   items=all_timezones,
                                   size=1)
@@ -1424,6 +1425,7 @@ class DateTimeWidget(Widget):
                 This only describes the field format settings, not the actual
                 format of provided value.
         query : Passthrough of given value.
+        timezone: the timezone to consider.
     """
     if not value:
       return None
@@ -1434,11 +1436,13 @@ class DateTimeWidget(Widget):
       value = value.encode(field.get_form_encoding())
     return {'query': value,
             'format': field.get_value('date_separator').join(input_order),
+            'timezone': field.get_value('default_timezone'),
             'type': 'date'}
 
   def render(self, field, key, value, REQUEST, render_prefix=None):
     use_ampm = field.get_value('ampm_time_style')
     use_timezone = field.get_value('timezone_style')
+    timezone = field.get_value('default_timezone')
     # FIXME: backwards compatibility hack:
     if not hasattr(field, 'sub_form'):
       from StandardFields import create_datetime_text_sub_form
@@ -1461,6 +1465,8 @@ class DateTimeWidget(Widget):
     ampm   = None
     timezone = field.get_value("default_timezone")
     if isinstance(value, DateTime):
+      if timezone:
+        value = value.toZone(timezone)
       year = "%04d" % value.year()
       month = "%02d" % value.month()
       day = "%02d" % value.day()
@@ -1525,6 +1531,9 @@ class DateTimeWidget(Widget):
 
     use_ampm = field.get_value('ampm_time_style')
     use_timezone = field.get_value('timezone_style')
+    default_timezone = field.get_value('default_timezone')
+    if default_timezone:
+      value = value.toZone(default_timezone)
 
     year = "%04d" % value.year()
     month = "%02d" % value.month()

product/ZSQLCatalog/SearchKey/DateTimeKey.py

@@ -59,7 +59,10 @@ def castDate(value, change_timezone=True):
     # input.
     assert value['type'] == 'date'
     format = value.get('format')
+    timezone = value.get('timezone')
     value = value['query']
+    if timezone:
+      value = "%s %s" % (value, timezone)
     if format == '%m/%d/%Y':
       date_kw.pop('datefmt')
   if isinstance(value, DateTime):