Entering smaller case y will output the year in numeric two digits, like 14. You can see a full list of format characters here.
Some examples of commonly used date and time format characters:
M d, Y – will output – Nov 06, 2014
d M, Y – will output – 06 Nov, 2014
F jS, Y – will output – November 6th, 2014
l, F jS, Y – will output – Thursday, November 6th, 2014
H:i:s – will output – 21:26:12
This is the API Guys (see video 4 https://apiguys.customerhub.net/day-4-saving-custom-fields – 37m)
