If you want to check in SQL when your databases was last back-upped (+ the type of back-up), you can execute the script below. this will list you everything of the last 7 days.
SELECT CONVERT(CHAR(100), SERVERPROPERTY('Servername')) AS Server, msdb.dbo.backupset.database_name, msdb.dbo.backupset.backup_start_date, msdb.dbo.backupset.backup_finish_date, msdb.dbo.backupset.expiration_date, CASE msdb..backupset.type WHEN 'D' THEN 'Database' WHEN 'I' THEN 'Differential database' WHEN 'L' THEN 'Log' WHEN 'F' THEN 'File/Group' WHEN 'G' THEN 'Differential file' WHEN 'P' THEN 'Partial' WHEN 'Q' THEN 'Differential partial' END AS backup_type, msdb.dbo.backupset.backup_size, msdb.dbo.backupmediafamily.logical_device_name, msdb.dbo.backupmediafamily.physical_device_name, msdb.dbo.backupset.name AS backupset_name, msdb.dbo.backupset.description FROM msdb.dbo.backupmediafamily INNER JOIN msdb.dbo.backupset ON msdb.dbo.backupmediafamily.media_set_id = msdb.dbo.backupset.media_set_id WHERE (CONVERT(datetime, msdb.dbo.backupset.backup_start_date, 102) >= GETDATE() - 7) ORDER BY msdb.dbo.backupset.backup_finish_date desc, msdb.dbo.backupset.database_name |