{{day-1}} substracts one from a date or date-specific pagename

{{Day-1}} - returns yesterday's date

{{Day-1|date}} - returns the day before the 'date' passed

{{Day-1|date|pagename|year|spacingchar}} - returns the name of the page one day before the 'datepage' passed in

Example
Code Result
{{Day-1}} त्रुटी: गलत/वा हुदैनहुने समय
{{Day-1|February 28}} त्रुटी: गलत/वा हुदैनहुने समय
{{Day-1|February 28|Wikipedia:Today's featured article/|2004}} त्रुटी: गलत/वा हुदैनहुने समय
{{day-1|{{day-1}}}} त्रुटी: गलत/वा हुदैनहुने समय
{{day-1|{{Currentmonthday}}|Wikipedia:Today's featured article/|{{CURRENTYEAR}}}} त्रुटी: गलत/वा हुदैनहुने समय
''[http://en.wikipedia.org/w/wiki.phtml?title=Wikipedia:POTD_row/{{day-1|4=_}},_{{CURRENTYEAR}}&action=edit Edit]'' त्रुटी: गलत/वा हुदैनहुने समय,_२०२४&action=edit Edit