tools (common/template): let specify timezone name in date_fmt filter

sat/tools/common/template.py

@@ -761,14 +761,23 @@ class Renderer(object):
         current = ctx["gidx"].current(value)
         return value if not current else "{}_{}".format(value, current)
 
-    def _date_fmt(self, timestamp, fmt="short", date_only=False, auto_limit=7,
-                  auto_old_fmt="short", auto_new_fmt="relative"):
+    def _date_fmt(
+        self,
+        timestamp: Union[int, float],
+        fmt: str = "short",
+        date_only: bool = False,
+        auto_limit: int = 7,
+        auto_old_fmt: str = "short",
+        auto_new_fmt: str = "relative",
+        tz_name: Optional[str] = None
+    ) -> str:
         if is_undefined(fmt):
             fmt = "short"
         try:
             return date_utils.date_fmt(
                 timestamp, fmt, date_only, auto_limit, auto_old_fmt,
-                locale_str = self._locale_str
+                auto_new_fmt, locale_str = self._locale_str,
+                tz_info=tz_name or date_utils.TZ_UTC
             )
         except Exception as e:
             log.warning(_("Can't parse date: {msg}").format(msg=e))