[CURRENTTIME] - current time
[CURRENTTIME:{%A, %e %B, %Y}] - current date and the display can be any valid PHP strftime format string.
[CURRENTTIME:+1day{%A, %e %B, %Y}] - optional date offset and display format. The offset can be any plus or minus any number of days and the display can be any valid PHP strftime format string.
[DAYSTOCHECKIN] - number of days until check-in