5U     - Giorgio, IU5HWS will be active again as 5UA99WS from  Niamey, Niger between 1 May 1 and 15 June.  In his spare time  he will be QRV  on 40-10m FT8 and SSB. QSL via LoTW, or via EA5GL. [TNX DX World]

9X     - Harold, DF2WO  will be active again as  9X2AW  from Rwanda on  5-15 May. He will operate CW, SSB and digital modes on the HF bands  and 6 metres. QSL via M0OXO's OQRS. [TNX The Daily DX]

BY     - Ten stations (B0CRA, B1CRA,  B2CRA,  B3CRA,  B4CRA,  B5CRA,  B6CRA, B7CRA, B8CRA and B9CRA)  from across the country  will be active on 1-5 May for this year's  "5.5 China Amateur Radio Festival"  on air event,  organized  by the  Chinese Radio Amateurs Club (CRAC).  See http://www.crac.org.cn/55  for  logsearch and the awards.  QSL  via LoTW, or via BA1GG.

DU     - Jairus, 4F1DY plans to be active on 40-10 metres SSB  from  Palawan Island (OC-128) on 4-7 May, and from Jomalig Island (OC-091)  on 9-11 May. QSL via EA5GL. [TNX DX World]

G      - Celebrating the  85th anniversary of the  First Class CW Operators' Club  (https://www.g4foc.org/),  special callsign  GB85FOC  will be used by a number of different members during the month of May.  QSL via G3SWH's OQRS (https://www.g3swh.org.uk/decision.html) and LoTW.

G      - Radio amateurs in the United Kingdom and Crown Dependencies may use a special Regional Secondary Locator on 1 May-30 June  to celebrate the Coronation of King Charles III  (alternatively, they can append the suffix  "/23C"  to their callsigns).  The RSL - i.e. the second letter in the  existing callsign  (D, I, J, M, U and W,  plus E for Intermediate licences) - may be replaced by the letter  'R';  where no RSL exists,  the letter 'R' may be added.  Club Log will map all the  GR/MR/2R  callsigns  to England,  unless a  callsign exception exists for the station.  A number of awards will be available;  see https://rsgb.org/coronation for the details.
Also taking part in the celebrations will be a number of GB special callsigns, including stations from England  (GB0KCC, GB0KCH, GB1KC, GB2KCC, GB3KCR, GB4HCC, GB4KC, GB4RLS), Jersey (GB3KCJ) and  Northern Ireland (GB0KC, GB8KC, GB8KCC, GB9HRH)  to name a few.  QSL, if any, via operators' instructions.

HK0/A  - Look for HK0/PY7RP, HK0/PY7XC and HK0/PY8WW  to be active from  San Andres Island (NA-033) on 4-11 May.  They will operate SSB, CW  and FT8 on 40-6m, with a focus on the higher bands and  a dedicated  6m station running 24/7.  Also, look for HK0/PY8WW to be QRV from Providencia (NA-049) on 1-3 May.  QSL HK0/PY7RP via Club Log's OQRS or direct to home call (and later LoTW);  QSL HK0/PY7XC  via  LoTW  or direct  to PT7WA  (he will also  upload his log to  Club Log);  QSL HK0/PY8WW via Club Log's OQRS or direct to home call.

I      - Ninety-five years ago (25 May 1928) the airship "Italia" crashed on the ice on its way back from the North Pole,  and a small tent dyed red for maximum visibility  was the only shelter for the survivors. Commemorating the role of radio (and amateur radio) in rescuing the Red Tent survivors, special callsign  II1ITR  will be active on 80, 40, 20, 15 and 10 metres SSB and CW from 25 May to 12 July. QSL via IZ1ETD. See https://www.qrz.com/db/II1ITR for more information.

JA     - Look for JE1HXZ/6 to be active from Kuroshima, Yaeyama Islands (AS-024) from 28 April to 8 May. He will operate CW, SSB, RTTY, FT8 and FT4 on the HF bands and 6 metres. QSL via the bureau and LoTW.

JA     - Look for Kenji, JA4GXS to be active as JA4GXS/6 from Amami O Island (AS-023) on 6-8 May. He will operate CW, SSB and FT8 on 40, 20, 15, 10 and 6m. QSL via home call, direct or bureau. [TNX The Daily DX]
         
ON     - Members of UBA Liege will be active as OP20CW on 1-31 May.  QSL via ON5VL (bureau)  or  direct via ON6YH;  the logs will be uploaded to LoTW, Club Log and eQSL.  The special callsign celebrates the  20th  anniversary since the UNESCO General Conference adopted the Convention  for  the  Safeguarding  of the  Intangible Cultural Heritage. Activity will have a special  focus on CW,  because the  Morse code has been recognized as Masterpiece of the Wallonia-Brussels Federation's Oral and Intangible Heritage since 2021. [TNX ON6DP]

ON     - Members of UBA Mechelen (ON4MCL) will operate special event station OS23SOM on 1-31 May  in celebration  of  Special Olympics Belgium's annual National Games,  this year to be held  in Mechelen on  17-20 May. A certificate will be available,  details will be published on https://www.qrz.com/db/OS23SOM.

PA     - On 5 May 1923  the Governor General of the  Netherlands East Indies opened officially  the two-way telegraphy radio service from  Radio Malabar (callsign PKX)  to Radio Kootwijk in the Netherlands (callsign PCG).  Celebrating the 100th anniversary of those pioneer stations in the field of  long-range long-wave  telegraphic communication, special event stations  PA100K, PA100M  and PA100PCG  will be active from 5 May to 30 June.  All QSOs will be confirmed automatically via the bureau.  Also taking part in the celebrations will be special event station 8A100K from Indonesia (5-13 May).  A certificertificate will be available; detailed information can be found on  https://radioclublimburg.nl/mk/index.html.

VE     - Canada is an independent country, but the  British monarch  remains the  nation's head of state.  Celebrating the  Coronation  of  King Charles III, Canadian radio amateurs are permitted to replace their normal prefix  from  5 May to 2 July:  VA stations can use  CJ,  VE stations can use CK,  VO stations can use CY,  and  VY stations can use CZ.

VK     - VI2023HRH  is the special callsign  for  members  of  the  Wireless Institute of Australia to celebrate the coronation of  King Charles III on 1-31 May. QSL via operator's instructions.

VP8    - Special callsign VP8KCC will be used from the  Falkland Islands  on 6-7 May to celebrate the Coronation of  King Charles III.  [TNX The Daily DX]

W      - Look for Mike, W7LG/4 to be active again from Hatteras Island  (NA-067) on 7-13 May.  He will operate CW, SSB and "FT modes".  QSL via  home call, LoTW and eQSL.