Niue is a small island northeast of New Zealand in the South Pacific Ocean.
A group of seven hams from the UK are operating there as E6GG thru September 29th. While not the rarest of DX, it is #97 on the Club Log most wanted list.
Give them a try around local sunrise their time, between the hours of 1700-1900 UTC on 15 meters. They have been hanging out around 21.003 and listening up about 1. Other bands like 20, 17 and 12 have been fruitful in the RI area. Expect signals to be S1 to S3.
These guys are GREAT operators, really digging out weak signals, and doing their best to upload logs to Club Log and LotW frequently.