It only makes sense if it was checking for it being daytime (i.e. after sunrise and before sunset) which you cannot do in cron, rather than check for a specific hour.

Even then, using an LLM is about the stupidest way imaginable to do it since it's not as if "when is it sunrise/sunset at a specific latitude and longitude and day of the year" can't just be calculated with a formula or looked up in a table of values - its not as if the sunrise and sunset hours given latitude, longitude and day of the year change from year to year.