implement custom datetime and date widgets based on customer requirements

src/wce_crm/constants.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import os
+import zoneinfo
 from pathlib import Path
 from typing import Final
 
@@ -25,3 +26,6 @@ class Config:
     PATH_LOGGING: Path = BASE_PATH / os.getenv("DOPT_PATH_LOGGING", "data/d-opt.log")
     LOG_FILENAME: str = "dopt.log"
     ALEMBIC_PATH: Path = BASE_PATH / os.getenv("DOPT_ALEMBIC_BASE", "python/alembic")
+
+
+TIMEZONE_CEST: Final[zoneinfo.ZoneInfo] = zoneinfo.ZoneInfo("Europe/Berlin")