Field name for Start Date and End Date

Hi Good day,

Kindly, I am looking for the field name for start date and End Date that I am suppose to use at portal bulk userid import.

I tried following Start_date and End_Date as well as Begda and Enda but its not working.

[User]

UID = ZZSCRIPT00

Password = mypassword

last_name = Alam

first_name = Tausif

start_date = 01/01/2008

end_date = 31/12/9999

$usermapping$:SAP_R3_HumanResources:user = myusermapping

Language = en_GB

accessibility = 0

Group = Shell-People Testing - Employee Oman;Shell-People Testing - Employee Pakistan;

department=Created by GSO

Could you please help me identify the field names.

I have to import 1000 users at portal for manual login.

Thank you.