In Mechilta (to ex. 12.16), while discussing whether or not work is forbidden on chol hamoed, the time before and after the six days of creation are referred to as holy. ששת ימי בראשית יוכיחו שיש קדושה לפניהם ולאחריהם ומותרים במלאכה Obviously after creation creation refers to the seventh ...

There are brachot said on phenomena and events. According to the instructions in the Artscroll, one says the lightning/thunder and rainbow blessings no more than once each day unless clouds dissipated and then returned. In that case, they can be said more often. The remaining blessings are said n...