You can connect a calendar to it to, I have my Google calendar connected and can ask Alexa what is on my calendar for today or a future date, for example. She will verbally respond with my schedule items. The Echo Spot (like the Show,) also visually displays upcoming items from the calendar.
Regarding the alarm, yes, you can stop the alarm by voice. I just say, “Alexa, stop” and the alarm stops until the next scheduled alarm.