| Title, Format | Label | Cat# | Country | Year | |
|---|---|---|---|---|---|
| Days Go By (CD, Maxi) | Credence, Parlophone | cdcred011, 8 79348 2 | UK | 2001 | |
| Days Go By - Remixes (CDr, Promo) | Parlophone | none | Sweden | 2001 | |
| Days Go By (12") | Credence | 12cred011 | UK | 2001 | |
| Days Go By (12") | Vendetta Records | VENMX 350 | Spain | 2001 | |
| Days Go By (12") | Dance Factory (2) | 8 79641 6 | Italy | 2001 | |
| Days Go By (12", Promo) | Credence | 12creddj011 | UK | 2001 | |
| Days Go By (CD, Maxi) | Parlophone | 7243 8 79581 2 8 | Australia | 2001 | |
| Days Go By (CD, Maxi) | Vendetta Records | VENCDS 350 | Spain | 2001 | |
| Days Go By (CD, Maxi) | EMI Music (Canada) | 7243 8 79348 2 5 | Canada | 2001 | |
| Days Go By (CD, Single) | Antler-Subway | AS 5965 CDS | Belgium | 2001 | |
| Days Go By (CD, Single) | Combined Forces | 7243 879716 2 2 | Netherlands | 2001 | |
| Days Go By (CD, Single, Promo, Car) | Credence | cdcreddj011 | UK | 2001 | |
| Days Go By (CDr, Maxi, Promo) | Credence | none | UK | 2001 | |
| Days Go By (Remixes) (12") | Credence | 12cred030 | UK | 2002 | |
| Days Go By (12") | Capitol Records | 7087 6 17423 1 2 | US | 2002 | |
| Days Go By (12", Ltd) | Capitol Records | 7243 8 77742 1 6 | US | 2002 | |
| Days Go By (2x12") | Capitol Records | Y 7243 8 77712 1 5 | US | 2002 | |
| Days Go By (2x12", Promo) | Credence | 12creddj 030 | UK | 2002 | |
| Days Go By (CD, Maxi) | Credence | CDCRED 030 | UK | 2002 | |
| Days Go By (CD, Maxi, Enh) | Credence | CDCREDS 030 | UK | 2002 | |
| Days Go By (CD, Maxi, Promo) | Capitol Records | DPRO 7087 6 16948 2 6 | US | 2002 | |
| Days Go By (CD, Maxi, Promo) | Capitol Records | DPRO 7087 6 16972 2 3 | US | 2002 | |
| Days Go By (CD, Single, Promo) | Credence | cdcreddj030 | UK | 2002 | |
| Days Go By (CDr, Single, Promo) | Not On Label | none | US | 2002 |
referencing Days Go By (Remixes), 12", 12cred030