Edit configuration object: system.date

"""
_core:\n
  default_config_hash: V9UurX2GPT05NWKG9f2GWQqFG2TRG8vczidwjpy7Woo\n
first_day: 0\n
country:\n
  default: CH\n
timezone:\n
  default: Europe/Zurich\n
  user:\n
    configurable: true\n
    default: 0\n
    warn: false\n
"""