As in: "At 2:15 AM, she entered the victim's bedroom carrying a knife."
Can that exact time be considered a part of an introductory phrase and split the sentence with a comma?
Also, if that could be the case, could you provide any websites where this exact structure is used? I've been looking for some examples, but the closest I could find was "On 12 July, the new law came into effect". None seem to be giving exact time in minutes as an introductory clause.
Thank you.