def METHOD_NAME():
    f = field.Date(default_timezone="UTC")
    now = datetime.now()
    now_with_tz = f._deserialize(now)
    assert now_with_tz.tzinfo == tz.gettz("UTC")
    assert now.isoformat() + "+00:00" == now_with_tz.isoformat()
    now_with_tz = f._deserialize(now.isoformat())
    assert now_with_tz.tzinfo == tz.gettz("UTC")
    assert now.isoformat() + "+00:00" == now_with_tz.isoformat()