I have subscribed to the birthdays and us holidays in iCal on my MacBook. How can I push calendars to the icloud and thus my iPhone/iPad devices?
Subscribed calendars don’t show up in iCloud.com calendars. There is not a solution for frequently, but you can try the following workaround.
* On your Mac, open iCal, click Calendars at the top-left and highlight the SUBSCRIPTIONS calendar you want to use.
* Click File > Export… > export the subscribed calendar. Click File > New Calendar > iCloud, and name the new calendar.
Go to File > Import > Import and choose the calendar file. In the Adding New Events dialog, choose the calendar name under the iCloud heading.
* Then them will appear shortly at icloud.com web site.