> Seems to work fine when date specification is not quite as ambiguous > as "2018/05". > > $ date --iso --date='2018-05-01 5 years ago' > 2013-05-01
What is special about --iso? If I use the following date string, I get a future time. Why? $ date --date='2018-05-01 4 years 11 months ago' +%Y%m 202106 -- Regards, Peng
