Django使用日期时间.日期()作为DateField的输入,以实现过去日期的输入

import datetime

class BalanceSheet(models.Model): 

     ticker = models.ForeignKey(Security, on_delete=models.CASCADE, related_name="balance_sheet")

     date = models.DateField(default=datetime.date)

但当我试图在管理面板中添加记录时,收到以下错误

TypeError at /admin/financials/balancesheet/add/
function missing required argument 'year' (pos 1)
Request Method: GET
Request URL:    http://localhost:8000/admin/financials/balancesheet/add/
Django Version: 3.1
Exception Type: TypeError
Exception Value:    
function missing required argument 'year' (pos 1)
Exception Location: /usr/local/lib/python3.7/site-packages/django/db/models/fields/__init__.py, line 831, in get_default
Python Executable:  /usr/local/bin/python
Python Version: 3.7.8
Python Path:    
['/code',
 '/usr/local/lib/python37.zip',
 '/usr/local/lib/python3.7',
 '/usr/local/lib/python3.7/lib-dynload',
 '/usr/local/lib/python3.7/site-packages']
Server time:    Sun, 09 Aug 2020 11:40:48 +0000