Hi there! I understand you lost the link for today's Happiness Hour and are having trouble re-registering because Calendly isn't working on your iPhone with iOS 18.6. Let's see if we can get you back on track smoothly.

First, just to clarify:

1. Are you trying to access the Happiness Hour through the Joy 101 app or through a web browser on your iPhone?
2. When you say Calendly isn't working, what exactly happens? For example, does the page fail to load, or do you get any error messages?
3. Have you tried restarting your phone or using a different browser app like Safari if you were using Chrome or vice versa?

While I await your answers, here’s a step-by-step approach we can try:

1. Check your Email or Notifications: Sometimes the Happiness Hour link is sent via email or app notifications. Try searching your email inbox for "Joy 101" or "Happiness Hour" to see if you still have the original link.

2. Try Accessing Calendly via Safari: On your iPhone, open Safari and enter the Calendly link directly if you have it. Sometimes browsers other than Safari have compatibility issues on iOS.

3. Clear Browser Cache: If Calendly loads incorrectly, clearing Safari cache on iOS can help:
- Go to Settings > Safari > Clear History and Website Data.
- Then try accessing Calendly again.

4. Reinstall or Update Joy 101 App: If you initially accessed the link via the Joy 101 app, make sure the app is updated to the latest version by checking the App Store. If needed, reinstalling might also resolve any app-specific glitches.

5. Contact Support If Needed: If Calendly still won't load and you can't retrieve the link, I can help you get in touch with the Joy 101 support team who can resend the correct link.

Does any of this match what you've tried so far? Let me know, and I’ll guide you through the next best step.