Hopefully this was ASAP!! I’m not sure what vocab you wanted to be used so I’m kinda just guessing as to how best answer your question. The underlined addresses your question, anything else is just fluff since I don’t have clear directions.
1.) Creo que la clase de primera hora empieza a las 12:30 (doce y media.) ¡Necesito apúrame, o llegaré tarde!
- I think first period starts at 12:30 (twelve thirty.) I need to hurry, or I’ll arrive late!
2.) Oye, sabias que la clase en la quinta hora empieza a las 13:10? (Trece y diez.) Está muy lejos para ir caminando, necesitamos correr!
- Hey, did you know that fifth period starts at 3:10? It’s very far to go walking, we need to run!
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A quick disclaimer on 24 hr time :) this is how to tell easily or convert it easily:
12 hr system
1 am - 12 pm -> 1pm - 12 am
24 hr System
0 (am) - 11 (pm) -> 23 pm
Basically, just continue to add hours from 11 pm until you reach 23. From which point you must go back to 0.