%0

Start time in localized format 

%1

End time in localized format 

%A

exdates in iCalendar format (semicolon-separated list of ISO 8601 date strings listing dates to exclude)

%a

rdates in iCalendar format (semicolon-separated list of ISO 8601 date strings listing recurrence dates)

%B

Start time (also see %Z)

%b

Output the start time and end time in iCalendar format. If the start time parameter has a value equal to the date, only the month/day/year portion of the date is output. If the end time has the same month/day/year value as the start time, only the start time is generated. 

%C

Create time 

%c

Event class 

%d

Event description. (also see %F)

%E

End time (also see %Z)

%e

Exception rules in iCalendar format 

%F

Event description - folded line, iCalendar format (also see %d)

%G

The event's geographic location (latitude and longitude) 

%g

Organizer's email address. (There is no guarantee as to the authenticity of this value.) 

%K

Organizer email in the form of a mailto:url

%k

Alarm count 

%L

Location 

%l

Recurrence rules in iCalendar format 

%M

Modify time 

%N

New line 

%n

The current time stamp used with DTSTAMP

%P

Priority 

%r

Recurrence id (blank if this event does not recur) 

%S

Event sequence number 

%s

Summary 

%t

Event status 

%U

Unique Event Identifier 

%Z

Used in conjunction with the time field code to force the time to be rendered in UTC. (%B displays the start time in local time whereas %ZB displays the start time in UTC time.)

%%

Displays the percent (%) character

%

Specifies a sub-format for the data identified by code. (For details, see E.4.3 Calendar Server Notifications Date Sub-Format Strings.)