Many of the runwhen programs accept arguments specifying timestamps. These timestamps can be given in any of these formats:
@400000003fa2abfa3789e734: a TAI64N stamp, preceded by
"@".
$VARIABLE: the name of an environment variable, preceded by
"$". The value of the variable should be a TAI64N
stamp, as above, but not including the "@".
n ("now"): the current time.
d1S: a decimal number specifying a number of seconds,
preceded by "d" and followed by
"S".
d1M: a decimal number specifying a number of minutes,
preceded by "d" and followed by
"M".
d1H: a decimal number specifying a number of hours,
preceded by "d" and followed by
"H".
d1d: a decimal number specifying a number of days,
preceded by "d" and followed by
"d".
d1W: a decimal number specifying a number of weeks,
preceded by "d" and followed by
"W". These last five formats are typically useful
with rw-add or
rw-sub, and are best thought of as
durations or intervals rather than points in time.
t1067625456: a system clock (time_t) value,
preceded by "t".
i2003-10-31T13:37:14-0500: an ISO 8601 format time,
preceded by "i".