You are on a mission today to keep me busy!!!
Yeah, that's a very good idea. It can be EXTREMELY complicated if you start messing with the timezones, trust me, the pain is unimaginable. But, in general, it shouldn't be too difficult so when you send a unix timestamp it would get translated and displayed into whatever time format settings are on the device you are viewing it .
Elapsed time is also not too difficult.
As with anything, what takes most of the time is the interface in the Dev Console but I think this shouldn't take me too long.
Let's first try to sort out your esp8266 and getMyStatus() problem and then I'll look into thsi