Frequently Asked Questions

You can add multiple calendar accounts on iPhone, such as iCloud, Google, Microsoft Exchange, and Yahoo. Detailed Steps: 1. Go to Settings > Apps > Calendar 2. Tap Calendar Accounts > Add Account 3. Do one of the following: • Tap a mail service (such as iCloud, Microsoft Exchange, or Google), then sign in • Tap Other, tap Add CalDAV Account or Add Subscribed Calendar, then enter your server and account information Verification: Check in the Calendar app to see if the newly added account's calendar options appear. Reference: https://support.apple.com/zh-cn/guide/iphone/iphc37be2016/ios

Most common cause is iCloud Calendar sync is not enabled. Follow these steps: Detailed Steps: 1. Open iPhone "Settings" app 2. Tap your name at the top 3. Select "iCloud" 4. Find "Calendars" option 5. Make sure "Calendars" toggle is green (enabled) 6. If already enabled, turn it off, wait 10 seconds, then turn it back on 7. Return to Calendar app and pull down to refresh Verification: Check on other devices (iPad/Mac) to see if you can view the same calendar events. If sync still doesn't work after following these steps, contact Apple Support.

Please follow these troubleshooting steps: Step 1: Confirm sync issues First follow the steps in [What to do when calendar won't sync?] to confirm iCloud calendar sync is working properly. Step 2: Check HachiCalendar settings 1. Tap HachiCalendar settings 2. Tap Calendar 3. Check if the calendar you want to sync is set to visible Verification: Check in HachiCalendar month view to see if events from that account appear. Note: Enterprise accounts may take a few minutes for initial sync.

Most common cause is sync frequency set too low. Follow these steps to optimize: Detailed Steps: 1. Open iPhone "Settings" app 2. Select "Calendar" 3. Tap "Accounts" 4. Select the external account with delay issues (Google, Outlook, etc.) 5. Tap the account name to enter details 6. Select "Fetch New Data" 7. Change "Fetch" frequency to "Every 15 Minutes" or select "Push" (if supported) 8. Return to Calendar app and manually pull down to refresh Verification: Create a test event in the external service web version and observe if it syncs to iPhone within 15 minutes. Note: External service sync delays of 5-15 minutes are normal.

Most common cause is Calendar notification permission is not enabled. Follow these steps: Detailed Steps: 1. Open iPhone "Settings" app 2. Select "Notifications" 3. Scroll down to find "Calendar" 4. Tap to enter Calendar notification settings 5. Make sure "Allow Notifications" toggle is green (enabled) 6. Make sure "Lock Screen", "Notification Center", "Banners" are all checked 7. Set "Banner Style" to "Persistent" 8. Return to Calendar app 9. Create a test event 5 minutes from now with 1-minute reminder Verification: Observe if you receive the test event reminder notification. If still no notifications, check if "Settings > Do Not Disturb" is enabled.

Most common cause is sync setting limited to "Recent Events". Follow these steps: Detailed Steps: 1. Open iPhone "Settings" app 2. Select "Calendar" 3. Tap "Sync" 4. Check current setting (may show "Events 1 Month Back" or "Events 3 Months Back") 5. Tap to select "All Events" 6. Return to Calendar app 7. Pull down to refresh and wait for sync to complete 8. Switch to "List" view to see all events Verification: In list view, scroll up to see if you can view older events. Important Note: Calendar apps do not actively delete events. If you still can't find events after these steps, visit icloud.com web version to confirm if data exists.