@Mystic..
There's nothing I can see wrong with your file.
I did, however, have to edit the first couple lines because in my installation I use the upgrade from
"2.Readme Calendar 2.0.7 to 2.0.7b UPDATE Instructions.txt"
Instruction #8, as follows
#-----------[ 8. OPEN ]------------------------------
# This includes several fixes and some minor additions
#
calendar.php
#
#-----------[ 9a. Find ~line 3 ]-------------------
#
require PUN_ROOT.'calendar/header.php';
require PUN_ROOT.'include/parser.php';
#
#-----------[ 9b. Replace with ]-----------------------
#
// require PUN_ROOT.'calendar/header.php';
require PUN_ROOT.'include/common.php';
require PUN_ROOT.'include/parser.php';
..
If you use this method but fail to implement that change you should receive a "failed to open stream" error code message (not a blank page) from /calendar/header.php, which I did not observe on your website.
I am a bit stumped |^\
I have two thoughts/suggestions:
1) Check your database tables
2) Copy all your calendar files to a local directory and run some diffs to the installation files so you can observe any other potential changes that may indicate file code corruption in any of those files, or anything else weird.
3)I hate to say it, but if the database is okay (and I think it probably is or you would most likely get a different error than a blanmk page) ...I think the way for you to troubleshoot this may be to...
1) backup the whole site
2) Remove the calendar Mod
3) Reinstall the calendar mod fresh
...taking things a step at a time and testing to see where/if it fails.
---------------------
I hope someone else can jump in here and offer you better suggestions.
If I think of anything else I will post back here.
Good luck.