'When writing a time of day in the U.S., it separates the hours & minutes'
a colon
LET'S PUNCTUATE: When writing a time of day in the U.S., it separates the hours & minutes
When writing a time of day in the U.S., it separates the hours & minutes
When writing a time of day in the U.S., it separates the hours & minutes
LET'S PUNCTUATE
a colon
LET'S PUNCTUATE