::
%pt[RT] YYYY-mm-ddTHH:MM:SS
+ %pt[RT]s YYYY-mm-dd HH:MM:SS
%pt[RT]d YYYY-mm-dd
%pt[RT]t HH:MM:SS
- %pt[RT][dt][r]
+ %pt[RT][dt][r][s]
For printing date and time as represented by::
By default year will be incremented by 1900 and month by 1.
Use %pt[RT]r (raw) to suppress this behaviour.
+The %pt[RT]s (space) will override ISO 8601 separator by using ' ' (space)
+instead of 'T' (Capital T) between date and time. It won't have any effect
+when date or time is omitted.
+
Passed by reference.
struct clk