Template:Encyclopedia Westarctica:This month in history/April
- 01 April - The Westarctica Civilian Corps was created by the Ministry of Citizenship & Immigration. (2018)
- 01 April - The Duke of Moulton-Berlin is appointed Kapellmeister. (2020)
- 02 April - Pope John Paul II is posthumously made a Knight Commander of the Holy Order of The Cross. (2005)
- 06 April - Prince Rainier III of Monaco, a Knight in the Noble Order of Westarctica, passes away. The Knighthood is then bestowed upon his son, Prince Albert II. (2005)
- 11 April - A delegation from Westarctica attends the first MicroCon (pictured), hosted by the Republic of Molossia, in Anaheim, California. (2015)
- 13 April - The Constitutional Convention is convened to draft a formal Constitution of Westarctica. (2019)
- 17 April - While in Palma de Mallorca, Spain, Grand Duchess Cathryn discovers she is pregnant with Prince Daniel Nicholas, the second heir to the Westarctican throne. (2005)
- 18 April - Grand Duke Travis writes to the Presidents of Laos and Eritrea requesting the immediate release of two religious prisoners being held because of their Christian faith. (2005)
- 20 April - Westarctica's first postage stamps are produced. (2005)
- 23 - 24 April - Grand Duke Travis hosted a delegation from the Republic of Saugeais, a French micronation, on a two-day diplomatic visit. (2018)
- 26 April - Molossia hosts the Prime Minister of Westarctica in a diplomatic visit. (2019)
- 28 April - The Royal Household of Grand Duke Travis is created by Royal Decree. (2023)
