Dear Statalisters, 
 
Here it is my (hopefully simple) problem in STATA 10,
Windows environment: 
I have a variable reporting dates of an intervention (date_baseline)
Then I would like to create a second variable simply going 
100 days forward date_baseline (let us call it
date_followup).
 
I tried with 
 
Gen date_followup = date_baseline + 100 
 
But unfortunately it creates a new variable reporting date 
(well I hope at least) not in MDY format but some thing like
 
  1. | 17103 |
  2. | 17113 |
  3. | 16518 |
  4. | 17106 |
  5. | 16697 |
 
Etc..
 
The I tried to convert these numbers in dates using 
 
tostring date_followup , replace format(%20.0f)
 
replace date_followup= date(followup , "MDY")
 
But it creates only missing values. 
 
How can I fix the problem ? 
 
Thank you in advance, 
 
Diego