As you guys probably noticed, my blog calendar did not display the date of posts since my having upgraded PHP 5.3.x to PHP 5.4.x. I always used the same type calendar when I had built my blog with Movable Type 4.x. I did not change it when I became to use WordPress. But now, I have to quit to use it? Oh, my.
Though I asked for the plugin author to fix this issue, I do not have any reply until now. I gave up to use my old calendar, and sought for the similar calendar i.e. one-line calendar. And I found. Voila!!
Thanks a lot, さかなさん.