April 21, 2022
Weekday
Thursday
Important events
American developer of home automation hardware and software
inception
end time
April 21, 2022 (17 years)
Soviet playwright, opinion journalist and specialist in literature
date of birth
date of death
April 21, 2022 (90 years 5 months 3 days)
Finnish philologist, professor emerita of Nordic philology (University of Turku)
date of birth
date of death
April 21, 2022 (73 years 1 month 9 days)
20-valent Pneumococcal Conjugate Vaccine Safety and Immunogenicity Study in Healthy Japanese Infants
clinical trial
start time
end time
April 21, 2022 (1 year 7 months 5 days)
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