LogFormat Question squid 2.6_Stable2

["Pablo García" <malevo@xxxxxxxxx>]

Hi, I'd like to know if there's any way to change the datetime format
for the %tl directive within the LogFormat configuration option.
I need to log this format "%Y/%b/%d %H:%M:%S", is there any env
variable, configuration option or compilation directive to achive this
?

Thanks, Pablo