[Clyde]

I do not think it's fair to say Buddhism copied from I Ching about 过午不食. Gautama Buddha himself ate only one meal a day and that's how this practice came about.

It was raining heavily with thunder. This monk was going for alms round at night and his whole body was all wet. He knocked on the door of a family. The house holder came to open the door and was frightened by the look of the monk.

The monk went back to relate the incident to Buddha. From then on Buddha told his disciples to skip the dinner. Also, they do not need much energy at night as they were going to sleep anyway.