24 hour clock that includes the seconds

There is no option as of yet for a 24 clock which encompasses seconds.  In Canada, when signing for a personal income tax return, Canada Revenue Agency [CRA] requires the 24 hour clock with seconds for their time stamp.  As of right now, DocuSign does offer a 24 hour clock, but not with seconds.  It only offers a 12 hour clock with seconds.  CRA requires, YYYY/MM/DD/HH/MM/SS.