Dynamic Formula Help. Need Sheet name to be a Month and Fill down

I have a main workbook below, which pulls data from another workbook called data.xlsx.
Excel 2016 (Windows) 32 bit

	A	B
1	Date	Number
2	Friday, 1 January 2016	500.00
3	Thursday, 5 May 2016	300.00
4	Saturday, 9 July 2016	400.00

Sheet: workbook1.xlsx

The formula I use in B2 is:

=INDEX([data.xlsx]Sheet1!$A$2:$A$30,MATCH(MIN(IF([data.xlsx]Sheet1!$D$2:$D$30=$A2,[data.xlsx]Sheet1!$C$2:$C$30)),IF([data.xlsx]Sheet1!$D$2:$D$30=$A2,[data.xlsx]Sheet1!$C$2:$C$30),0))

The problem I am now having with this formula is that my data.xlsx has exceded the excel row limit of 1mil+
So I have now broken my data.xlsx Workbook into Sheets named Jan, Feb, Dec etc inside data.xlsx

Is there anyway I can have my formula when it fills down column B change the "Sheet1" to the Month in column A ??

data.xlsx

	A	B	C	D
1	Number		Time	Date
2	500		5:00:00	Friday, 1 January 2016
3	100		5:00:00	Friday, 1 January 2016
4	200		5:00:00	Friday, 1 January 2016
5	300		5:00:00	Friday, 1 January 2016
6	500		5:00:00	Friday, 1 January 2016
7	300		5:00:00	Thursday, 5 May 2016
8	500		5:00:00	Thursday, 5 May 2016
9	400		5:00:00	Thursday, 5 May 2016
10	600		5:00:00	Thursday, 5 May 2016
11	500		5:00:00	Thursday, 5 May 2016
12	400		5:00:00	Saturday, 9 July 2016
13	800		5:00:00	Saturday, 9 July 2016
14	200		5:00:00	Saturday, 9 July 2016
15	300		5:00:00	Saturday, 9 July 2016
16	600		5:00:00	Saturday, 9 July 2016

Sheet: data.xlsx