To enter a timeuuid corresponding to now, use the timeuuid()
function, e.g. (taken from this example):
CREATE COLUMN FAMILY blog_entry
WITH comparator = TimeUUIDType
AND key_validation_class=UTF8Type
AND default_validation_class = UTF8Type;
SET blog_entry['yomama'][timeuuid()] = 'I love my new shoes!';
To enter a timestamp into a datetime function use the unix timestamp, see the following example (taken from a related question), where we insert a unix timestamp into a DateType
column:
set test['userID']['dob']=567999912112;