DateTime display 24 hour to AM / PM

Google around for this, but can’t seem to find it. I am trying to display DateTime in the following as 12 hour AM / PM time.

DateTime	Sunrise_Time	"Sunrise [%1$tH:%1$tM]"		{astro="planet=sun, type=rise, property=start"}
DateTime	Sunset_Time	"Sunset [%1$tH:%1$tM]"		{astro="planet=sun, type=set, property=end"}

DateTime Sunrise_Time “Sunrise [%1$tl:%1$tM %1$tp]” {astro=“planet=sun, type=rise, property=start”}
DateTime Sunset_Time “Sunset [%1$tl:%1$tM %1$tp]” {astro=“planet=sun, type=set, property=end”}

I have

DateTime Sunrise_Time “Sunrise [%1$tl:%1$tM %1$tp]” {astro=“planet=sun, type=rise, property=start”}
DateTime Sunset_Time “Sunset [%1$tl:%1$tM %1$tp]” {astro=“planet=sun, type=set, property=end”}

in my items file. It does display in 12 hour format but it fails to append AM or PM to the displayed time in the item state. Any clues?

You haven’t accidentally overriden the Item provided label by setting a label in your Sitemap entry?

Check here for time and date formatting commands.
It should look something like this

DateTime Date  "Date [%1$tA, %1$tB  %1$td, %1$tY]" 
DateTime Time  "Time [%1$tI:%1$tM %1$Tp]"

Pay close attention to the capitalization of the letters within the [ ] !!