Attachments: Up to 2 attachments (including images) can be used with a maximum of 512.0 KiB each and 1.0 MiB total.
I tested your skill and it said there are "Welcome back, there are 320 days until your birthday".I also did the tutorial up to step 4, but did not experience any issues: https://github.com/alexa/skill-sample-python-first-skill/tree/master/module-1#step-4-test-your-skill.
The forums is for general questions that can benefit the community, so if you have specific questions about your skill you can write to use here and mentioned that you were working with me: https://developer.amazon.com/alexa/console/contact-us.
2 People are following this question.
Dynamically elliciting the slots and capturing the response in lambda (Python)
Alexa Service not returning custom slot value
Issue calling intent from another intent
Alexa skill - user should say search words
Do NextIntent and RepeatIntent need Lambda Function Updates?