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[
define_tag:'lp_date_days1970',
-description='Returns number of days since 1/1/1970.',
-priority='replace',
-optional='date',-copy,-type='date';
if: !local_defined:'date';
local:'date' = date;
/if;
#date->(setformat:'%D');
return: (date_difference: (date: (string:#date) + ' 12:00:00'), (date:'1/1/1970 12:00:00') ,-day);
/define_tag;
]
