Is there anyway to customize date picker with python?

[masoudhani]

I need to customize date picker in a script toolbox so base on the input data, user could pick a date or different dates to do some process.

[DanPatterson_Retired]

Python only interfaces with tools in arctoolbox in that it can call a tool.  Or there is the arcpy module and there is no reference to data picker.  Perhaps you had better clarify or show what it is you need.  

Did you get a reference somewhere that python could be used? or were you just hoping to use python?

[JoeBorgione]

I think you are referring to what's known as a comb-box: a pick list that is pre-populated with values.  (Think attributes domains values).  I've used them in python addins, but I've not used hem in a script tool.  However, check this out:  arcpy - Choosing string from dropdown list rather than typing it into Python script tool? - Geograph... It describes:

Set the data type to string and change the filter type from None to Value List. Here you can add in all the values you want to see in a drop down list.

Additionally, see:

Setting script tool parameters—Help | ArcGIS Desktop 

Setting script tool parameters—Geoprocessing and Python | ArcGIS Desktop