Last day 31 de marzo fue el Día Mundial de la Copia de Seguridad (backupIn English). Esta fecha no es escogida por casualidad, si no que es debido a que el día siguiente, the day 1 April, it's April Fools' Day in the Anglo-Saxon world and it's a good day to play a joke in the form of “accidental file deletion”.
Backups can save us from a disaster in the event of an emergency or a malicious agent, it's important to keep them updated and check that they are done correctly with recovery drills. Of course, you also have to keep this backup in a place far from the device that was copied (no, it's not enough to make them on an external hard drive that remains permanently connected to the computer).
That is why, if you still don't have any backup or don't do it regularly, remember that 31 March 31st is a celebration in the form of a reminder that you should not forget.