Problem with add_date_picker

## Version of Dear PyGui

Version: 2.0.1
Operating System: Windows 11

## My Issue/Question

When adding an add_date_picker element with a default_value parameter containing a year greater than 1999, the default value is set to 01/01/1970 instead of the expected date. (Sorry for my English I use a translator)

## To Reproduce

specify year values ​​in default_value in add_date_picker greater than 1999

## Expected behavior

The add_date_picker element must correctly handle any integer year value passed in the default_value parameter. The date is expected to be set exactly according to the passed values, including correctly handling years from any century (both the 20th, the 21st and later).

## Screenshots/Video

## Standalone, minimal, complete and verifiable example

```python
import dearpygui.dearpygui as dpg

dpg.create_context()
dpg.create_viewport()
dpg.setup_dearpygui()

with dpg.window():
dpg.add_date_picker(level=dpg.mvDatePickerLevel_Day, default_value={'month_day': 31, 'year':25, 'month':11})
dpg.add_spacer(height=50)
dpg.add_date_picker(level=dpg.mvDatePickerLevel_Day, default_value={'month_day': 31, 'year':99, 'month':11})
dpg.add_spacer(height=50)
dpg.add_date_picker(level=dpg.mvDatePickerLevel_Day, default_value={'month_day': 31, 'year':2025, 'month':11})

dpg.show_viewport()
dpg.start_dearpygui()
dpg.destroy_context()
```