I just had a incident at work were I was supposed to joining a conference call for a maintenance window for a customer. I jumped on the bridge call at 8 PM Mountain time and waited for a 1/2 hour but nobody came into the call with me. Thought that it was strange, checked the case notes for the time and confirmed the time. I then sent a customer an email letting me know that I attended the bridge call but nobody was there.
Today I got an email letting me know that the conference call was for 8 AM Mountain time.... Oh hell did I feel bad, I went and checked the case notes and sure enough were I swore I read 8 PM was 8 AM... I then sent a email to the customer apologizing for the miscommunication. I was let know that the maintenance window went well and without issue and everything was alright.
For reasons like this, my own inability to read AM or PM, it would be so nice to be on military time