The Amateur Radio League of Finland is celebrating its 100 year anniversary in 2021 with a special certificate. Contact 100 Finnish stations (50 OH and 50 OF) during the year, plus 10 special stations (OH100SRAL, OH2A, OH0W, OJ0C, OF2HQ, OH2YOTA, OG2B, OH6SRAL, OI3AX and OF9X) to qualify.
Details at:
OH Northern Lights 100-year certificate (OH-NL-100)
Dutch Fork Amateur Radio Group 