The manual says 

> 
> For the daily/weekly agenda, the items for each day are sorted. The
>  default order is to first collect all items containing an explicit
>  time-of-day specification.
> 
> 
> 

```
    8:30-13:00 Arthur Dent lies in front of the bulldozer
    12:45...... Ford Prefect arrives and takes Arthur to the pub
    14:00-15:00 TODO Call John regarding memo
    19:00...... The Vogon reads his poem
    20:30-22:15 Marvin escorts the Hitchhikers to the bridge
    TODO send newsletter to mailing list
    TODO buy John birthday gift           :errands:
    Internship period for Alex

```

How can I tweak `org-agenda-sorting-strategy' so that I can first display all items containing no time-of-day specification like in

```
    Internship period for Alex
    TODO send newsletter to mailing list
    TODO buy John birthday gift           :errands:
    8:30-13:00 Arthur Dent lies in front of the bulldozer
    12:45...... Ford Prefect arrives and takes Arthur to the pub
    14:00-15:00 TODO Call John regarding memo
    19:00...... The Vogon reads his poem
    20:30-22:15 Marvin escorts the Hitchhikers to the bridge

```