Perform searches based on the time at which the provided user's last session began.
If any user is provided, it will return the time at which the current user last session began, that is the same time returned by currentLogin() native JQL function.
Perform searches based on the start of the current quarter of year.
See also: endOfQuarter()
Perform searches based on the end of the current quarter of year.
See also: startOfQuarter()