The reader who asked about the liturgical day writes:
Very good, Thanks Jimmy. What happens with daylight savings time, is it ever addressed? Just curious. Thanx for being an ultra cool guy.
The Code of Canon Law does not address daylight savings time, but the answer is not in doubt. The legislator (that is to say, the pope) has not created a legally-binding "ecclesiastical clock" different from local, civil timekeeping. As a result, "ecclesiastical midnight" (to coin a term) is the same as "civil midnight" (to coin another term), the latter being whatever midnight is considered to be according to local civil law. The legislator is not concerned about daylight savings time or occasional twenty-three or twenty-five hour days as we shift into or out of daylight savings time.
Hypothetically, I can imagine legal situations where such considerations would become relevant under canon law (e.g., if there was a dispute about whether a particular person had the exercise of a right or office until a certain day and that day happened to be longer or shorter due to the shift into or out of daylight savings time). However, thus far the legislator has not been concerned to address these situations. As far as things like fast and abstinence, which is where the day division affects most people, he is content to allow local civil midnight to be the local church’s midnight, too.
As far as being cool, that’s not me. That’s just the air conditioning.
