I get this Error when use Arabic Language only

Traceback (most recent call last):
  File "/opt/odoo15/odoo/odoo/addons/base/models/ir_http.py", line 237, in _dispatch
    result = request.dispatch()
  File "/opt/odoo15/odoo/odoo/http.py", line 688, in dispatch
    result = self._call_function(**self.params)
  File "/opt/odoo15/odoo/odoo/http.py", line 360, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/opt/odoo15/odoo/odoo/service/model.py", line 94, in wrapper
    return f(dbname, *args, **kwargs)
  File "/opt/odoo15/odoo/odoo/http.py", line 349, in checked_call
    result = self.endpoint(*a, **kw)
  File "/opt/odoo15/odoo/odoo/http.py", line 917, in __call__
    return self.method(*args, **kw)
  File "/opt/odoo15/odoo/odoo/http.py", line 536, in response_wrap
    response = f(*args, **kw)
  File "/opt/odoo15/odoo/addons/web/controllers/main.py", line 1348, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "/opt/odoo15/odoo/addons/web/controllers/main.py", line 1340, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/opt/odoo15/odoo/odoo/api.py", line 464, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
  File "/opt/odoo15/odoo/odoo/api.py", line 451, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/opt/odoo15/odoo/odoo/models.py", line 6350, in onchange
    defaults = self.default_get(missing_names)
  File "/opt/odoo15/odoo/addons/hr_holidays/models/hr_leave.py", line 71, in default_get
    defaults = super(HolidaysRequest, self).default_get(fields_list)
  File "/opt/odoo15/odoo/odoo/models.py", line 1429, in default_get
    value = field.convert_to_cache(value, self, validate=False)
  File "/opt/odoo15/odoo/odoo/fields.py", line 2037, in convert_to_cache
    return self.to_datetime(value)
  File "/opt/odoo15/odoo/odoo/fields.py", line 2017, in to_datetime
    return datetime.strptime(value, DATETIME_FORMAT[:len(value)-2])
  File "/usr/lib/python3.8/_strptime.py", line 568, in _strptime_datetime
    tt, fraction, gmtoff_fraction = _strptime(data_string, format)
  File "/usr/lib/python3.8/_strptime.py", line 349, in _strptime
    raise ValueError("time data %r does not match format %r" %
Exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/opt/odoo15/odoo/odoo/http.py", line 644, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/opt/odoo15/odoo/odoo/http.py", line 302, in _handle_exception
    raise exception.with_traceback(None) from new_cause
ValueError: time data '٢٠٢٢-٠٢-١١' does not match format '%Y-%m-%d'