How can I convert Fiscal Period Data to either Calendar year or Quarter?

#1
Hello,

I have data on air travels extracted from fiscal periods budgets. The fiscal periods are from 2010/2011-2018/2019 respectively. I want to expand this data to obtain large sample observations for regression purpose. I would appreciate if anyone can show me the way out both manually and using econometric package like Eviews, R, or STATA.

Best regards,

Joe