I have not done a full test of working code but here is a non javascript approach.
You can do successive URL calls like this, where each of the formula variables is a URL formula, such as API_AddRecord.
Here is an example of a formula I used in an app once.
var text YYOtherMonths = Right(ToText(Year(Today())),2);
var text AddJAN = URLRoot() & "db/" & [_DBID_TABLE_1] & "?act=API_AddRecord&_fid_189=" & [Project ID#]& "&_fid_197=" & "01-01-" & $YYOtherMonths;
var text AddFEB = URLRoot() & "db/" & [_DBID_TABLE_1] & "?act=API_AddRecord&_fid_189=" & [Project ID#]& "&_fid_197=" & "02-01-" & $YYOtherMonths;
var text AddMAR = URLRoot() & "db/" & [_DBID_TABLE_1] & "?act=API_AddRecord&_fid_189=" & [Project ID#]& "&_fid_197=" & "03-01-" & $YYOtherMonths;
var text AddAPR= URLRoot() & "db/" & [_DBID_TABLE_1] & "?act=API_AddRecord&_fid_189=" & [Project ID#]& "&_fid_197=" & "04-01-" & $YYOtherMonths;
var text AddMAY = URLRoot() & "db/" & [_DBID_TABLE_1] & "?act=API_AddRecord&_fid_189=" & [Project ID#]& "&_fid_197=" & "05-01-" & $YYOtherMonths;
var text AddJUN = URLRoot() & "db/" & [_DBID_TABLE_1] & "?act=API_AddRecord&_fid_189=" & [Project ID#]& "&_fid_197=" & "06-01-" & $YYOtherMonths;
var text AddJUL = URLRoot() & "db/" & [_DBID_TABLE_1] & "?act=API_AddRecord&_fid_189=" & [Project ID#]& "&_fid_197=" & "07-01-" & $YYOtherMonths;
var text AddAUG = URLRoot() & "db/" & [_DBID_TABLE_1] & "?act=API_AddRecord&_fid_189=" & [Project ID#]& "&_fid_197=" & "08-01-" & $YYOtherMonths;
var text AddSEP = URLRoot() & "db/" & [_DBID_TABLE_1] & "?act=API_AddRecord&_fid_189=" & [Project ID#]& "&_fid_197=" & "09-01-" & $YYOtherMonths;
var text AddOCT = URLRoot() & "db/" & [_DBID_TABLE_1] & "?act=API_AddRecord&_fid_189=" & [Project ID#]& "&_fid_197=" & "10-01-" & $YYOtherMonths;
var text AddNOV = URLRoot() & "db/" & [_DBID_TABLE_1] & "?act=API_AddRecord&_fid_189=" & [Project ID#]& "&_fid_197=" & "11-01-" & $YYOtherMonths;
var text AddDEC = URLRoot() & "db/" & [_DBID_TABLE_1] & "?act=API_AddRecord&_fid_189=" & [Project ID#]& "&_fid_197=" & "12-01-" & $YYOtherMonths;
var text DisplayProjectRecordinEditMode = URLRoot() & "db/" & [_dbid_projects] & "?a=er&dfid=19&rid=" & [Project ID#];
$AddJAN
& "&rdr=" & URLEncode($AddFEB)
& URLEncode("&rdr=" & URLEncode($AddMAR))
& URLEncode(URLEncode("&rdr=" & URLEncode($AddAPR)))
& URLEncode(URLEncode(URLEncode("&rdr=" & URLEncode($AddMAY))))
& URLEncode(URLEncode(URLEncode(URLEncode("&rdr=" & URLEncode($AddJUN)))))
& URLEncode(URLEncode(URLEncode(URLEncode(URLEncode("&rdr=" & URLEncode($AddJUL))))))
& URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode("&rdr=" & URLEncode($AddAUG)))))))
& URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode("&rdr=" & URLEncode($AddSEP))))))))
& URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode("&rdr=" & URLEncode($AddOCT)))))))))
& URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode("&rdr=" & URLEncode($AddNOV))))))))))
& URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode("&rdr=" & URLEncode($AddDEC)))))))))))
& URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode(URLEncode("&rdr=" & URLEncode($DisplayProjectRecordinEditMode))))))))))))
So one approach is to just use a version of the the button above to make 11 duplicates, each different by the month. That would work when you have the record made for month 1.
Then you could also make 11 versions of the buttons and use form rules to show / hide the appropriate buttons. For example if the month was "3", then you could show the button which would make months 4,5,6,7,8,9,10 11 and 12.
