I followed the documentation on filtering. Used the following code in order to fetch date range data.
&filter[datefilter][condition][path]=field_date&filter[datefilter][condition][operator]=>=&filter[datefilter][condition][value]=${fiscal_year_start}&filter[datefilter][condition][path]=field_date&filter[datefilter][condition][operator]=<=&filter[datefilter][condition][value]=${fiscal_year_end}
It fetches the second filter condition only. It would be great if anyone can help me with this issue.