./configure --with-php-config=/usr/local/php/bin/php-config --enable-calendar
make
make install
修改php.ini
vi /usr/local/php/etc/php.ini
增加：
extension=/usr/local/php/lib/php/extensions/no-debug-non-zts-20131226/calendar.so
service php-fpm reload
service nginx reload
原文：http://blog.51cto.com/28917/2322216