Fixing Validation Errors

While testing importing the iCal into non-Apple calendars I consistently get errors. When I run the iCal feed through a validator it throws errors like this: Error at line 11:Cannot set timezone for UTC It points to DSTAMP and the way the plugin uses timezones. Then I found a bunch of articles pointing to the need for only using the Z format. So I’m suggesting these changes: change this $start_time = date( 'Ymd\THis', get_post_time( 'U', false, $post->ID ) ); $end_time = date( 'Ymd\THis', get_post_time( 'U', false, $post->ID ) + ($options['icalfeeds_minutes'] * 60)); to this: $start_time = date( 'Ymd\THis', get_post_time( 'U', true, $post->ID ) ); $end_time = date( 'Ymd\THis', get_post_time( 'U', true, $post->ID ) + ($options['icalfeeds_minutes'] * 60)); And then change this: $modified_time = date( 'Ymd\THis', get_post_modified_time( 'U', false, $post->ID ) ); to this: $modified_time = date( 'Ymd\THis', get_post_modified_time( 'U', true, $post->ID ) ); and finally change this: if ($timezone === 'UTC') { $start_time = ":$start_time" . 'Z'; $end_time = ":$end_time" . 'Z'; $modified_time = ":$modified_time" . 'Z'; } else { $start_time = ";TZID=$timezone:$start_time"; $end_time = ";TZID=$timezone:$end_time"; $modified_time = ";TZID=$timezone:$modified_time"; } to this: $start_time = ":$start_time" . 'Z'; $end_time = ":$end_time" . 'Z'; $modified_time = ":$modified_time" . 'Z'; Hope that helps. Added in 1.4.2, thanks 🙂 Did 1.4.2 ever get released?!? Weird, the commit never went to WordPress. I pushed a dummy commit and it’s OK now. Sorry!