Client:
say "time" in chat (wo quotes)
Server:
"time" in console (wo quotes)
cvar - amx_time_speak - 2 is default. 0 = Time is displayed, 1 = Time w/beep, 2 = Time w/beep and Speech
cvar - amx_time_interval - 1 is default. 0 = Every Hour, 1 = Half Hour, 2 = 15 Minutes
cvar - amx_time_offset - 0 is default. Can set negative or positive the number of hours to offset time by.
*/