e=date(2019, 1, 1))
v = SchemaValidator(schema)
assert v.validate_python(date(2019, 6, 1)) == date(2019, 6, 1)
```

Args:
    strict: Whether the value should be a date or a value that can be converted to a date
    le: The value must be less than or equal to this date
    ge: The value must be greater than or equal to this date
    lt: The value must be strictly less than this date
    gt: The value must be strictly greater than this date
    now_op: The value must be in the past or future relative to the current date
    now_utc_offset: The value must be in the past or future relative to the current date with this utc offset
    ref: optional unique identifier of the schema, used to reference the schema in other places
    metadata: Any other information you want to include with the schema, not used by pydantic-core
    serialization: Custom serialization schema
r