Hello @rupi,

Nice that you ask the community here! 

First, I want to let you know that there is an international Personio community that is in English. Here you will get faster answers to your questions, as there are many English speaking Personio users. Please just navigate to community.personio.com.

Now let's take a look at your question:

Personio does not provide an "Initial Entry Date" attribute by default, but you can create a custom attribute and enter that information. You can then link this attribute to the document templates. 

Following Helpcenter articles may help here:

• Create Custom Sections and Attributes
• Configuring Document Templates

Does this already answer your question?

Have a fantastic day
Marc