WBO champion Parker fights IBF and WBA champion Anthony Joshua in Cardiff on April 1 (NZT).
A week earlier, on March 25, the Samoan nation will concentrate their thoughts and prayers on Parker whose parents were born in the island nation.
It continues Samoa's strong support for Parker.
The Samoan government gave financial assistance for Parker's successful world title bid against Andy Ruiz in Auckland in late 2016 and again for his first defence against Razvan Cojanu last year.
