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How to fix iPhone “Cannot Verify Server Identity” error

If you haven’t signed into a public WiFi or you don’t have access to the Internet, your iPhone may display an error message about the server identity of

This article describes a couple of ways to fix the problem.

The exact error message looks like this:

Cannot Verify Server Identity

The identity of “” cannot be verified.

Fix 1: sign into public WiFi

If you are on a public WiFi, sign into the WiFi (see “Use captive Wi-Fi networks on your iPhone, iPad, or iPod touch“). Or, disable WiFi completely and use your mobile data. Usually this will fix the problem.

Sometimes you’ll need to do the above and also restart your phone.

Fix 2: disable SSL for calendars

Another way you can fix it is to disable SSL for the calendar. This will cause your iPhone to refresh any subscribed calendar feeds over HTTP instead of HTTPS.

To disable SSL for a Hebcal calendar that, go to Settings > Calendar > Accounts > Subscribed Calendars > Hebcal and the set “Use SSL” to Off.

Here’s an example screenshot showing the recommended settings:

Outlook for Microsoft 365 for Mac Jewish holidays download

This page includes instructions on how to subscribe to a Hebcal Jewish holiday calendar 5-year feed in Outlook for Microsoft 365 for Mac, Outlook 2021 for Mac, Outlook 2019 for Mac, and Outlook 2016 for Mac.

Microsoft now recommends that you sync your account to the Microsoft Cloud. “Available for Google, Yahoo, iCloud, and IMAP accounts in Outlook for Mac, this allows you to enjoy many of the best features of Mail and Calendar and Outlook for Mac.”

The following instructions demonstrate how to subscribe to a Hebcal calendar on, and then synchronize those calendars to Outlook for Mac on your desktop.

1. Open a web browser on your macOS computer.

2. Fill out the form with your preferences and click the Create Calendar button

3. Click the Download… button

4. Select the Outlook Web option from the Download dialog box

5. Click the Add to button. This button will take you directly to Microsoft’s Outlook Web calendar import page

6. If prompted, login using your Microsoft username and password

7. When Outlook Web prompts you to Subscribe from web, confirm your options (such as color and charm) and then click the Import button

8. Return to Outlook for Mac on your macOS computer. Go to the Calendar view, then select Tools > Sync

9. Check the box next to the Hebcal calendar in the Other Calendars section on the left side of the page and your events will display

Outlook Mac – delete Hebcal Jewish calendar merged events

Follow these steps to remove Hebcal events from Microsoft Outlook for macOS and you didn’t use the Subscription feature.

1. Open Microsoft Outlook for macOS, and uncheck all calendars except for the one that contains Hebcal events.

2. In the search box on the upper-right, type the text “hebcal” and press Return to select Events that contain “hebcal”

3. Click on the first item in the search results pane on the right. Then, Select All by using ⌘-A (Command-A) on your keyboard. Or, scroll to the bottom, and holding down the Shift key, click on the last item in the search results pane on the right.

4. When prompted Are you sure you want to permanently delete these events? click the Delete button to confirm – delete Hebcal Jewish calendar

To remove a Hebcal Internet Calendar Subscription from on the Web (for,,, and email addresses)

This technique will also work with Windows 10 devices (desktops, laptops, tablets and phones) that have a built-in calendar application that connects to

Start by logging into your account at

On the left side of the page, under the heading “Other Calendars”, you can see your subscriptions.

Find the Hebcal calendar you wish to remove, click on the three dots (···) and then select “Remove” from the pop-up menu:

Microsoft Outlook – delete Hebcal Jewish holidays from Office 365

Here are a few options for how to remove Hebcal events from your Outlook 365 calendar on Windows:

  • To remove an Internet Calendar Subscription from side-by-side view, clear the check mark for the calendar in the Navigation Pane.
  • To remove the Internet Calendar Subscription from the Navigation Pane, right-click the calendar name, and then click Delete calendar name.
  • Internet Calendar Subscriptions can be added, changed, or removed from the Account Settings dialog box. On the Tools menu, click Account Settings, and then click the Internet Calendars tab.

These instructions also apply to Outlook 2007, Outlook 2010, or Outlook 2013 on Windows.