SQL Server/Agent restart time

SELECT [SQL Server Start Time] = CONVERT(VARCHAR(23), a.sql_start, 121),
       [SQL Agent Start Time] = CONVERT(VARCHAR(23), a.agent_start, 121),
       [SQL Uptime] = CONVERT(VARCHAR(15),
                      RIGHT(10000000+Datediff(dd, 0, Getdate()-a.sql_start), 4)
                      + ' '
                      + CONVERT(VARCHAR(20), Getdate()-a.sql_start, 108)),
       [Agent Uptime] = CONVERT(VARCHAR(15),
RIGHT(10000000+Datediff(dd, 0, Getdate()-a.agent_start), 4)
+ ' '
+ CONVERT(VARCHAR(20), Getdate()-a.agent_start, 108))
FROM   (SELECT SQL_Start = Min(aa.login_time),
               Agent_Start = NULLIF(Min(CASE
                                          WHEN aa.program_name LIKE 'SQLAgent %'
                                        THEN
                                          aa.login_time
                                          ELSE '99990101'
                                        END), CONVERT(DATETIME, '99990101'))
        FROM   master.dbo.sysprocesses aa
        WHERE  aa.login_time > '20000101') a