12 April 2021

• 102nd day of the year. There were then 263 days left in 2021.
• 15th Monday of 2021.
• on the 15th week of 2021 (using ISO standard week number calculation).
• 24th day of Spring. There were 70 days left till Summer.
• Birthstone for this day: Diamond and Crystal

There are no major holidays or observances in the EU for this date.

• International Day of Human Space Flight - Popular in:
  CountryAustraliaCanadaIndiaNew ZealandSouth AfricaUnited KingdomUnited States
• National Grilled Cheese Day - United States
• Ramadan (Begins) - United States, Canada
• Chaitra Shukladi (चैत्र शुक्लादि) - India