- What horse racing was on 21 September 2017?
- 39 races across 5 meetings were run on 21 September 2017: Ballinrobe (8 races), Chelmsford City (AW) (8 races), Pontefract (7 races), Saint-Cloud (FR) (8 races) and Yarmouth (8 races). That is Ballinrobe in Ireland; Chelmsford City (AW), Pontefract and Yarmouth in Great Britain; Saint-Cloud (FR) in France. KTB's archive covers British, Irish and French racing; every result and every runner from these meetings is on this page.
- What was the going at each meeting on 21 September 2017?
- Ballinrobe: Soft To Heavy (Turf); Chelmsford City (AW): Standard (AW); Pontefract: Good To Soft (Turf); Saint-Cloud (FR): Heavy (Turf); Yarmouth: Good To Soft (Turf).
- How did the favourites do on 21 September 2017?
- Outright favourites won 12 of 34 on 21 September 2017 (35.3%); joint favourites won 3 of 13. £1 on every outright favourite would have staked £34.00 and returned £38.54 — a profit of £4.54. Across every race in KTB's archive, outright favourites win 34.2% of the time (96,834 of 283,117 favourites, as at 3 October 2026). The biggest-priced winner was Gold Hunter (IRE) at 16/1 in the 7:15 Havens Hospices Handicap at Chelmsford City (AW).
- What was the feature race on 21 September 2017?
- The feature race was the 4:05 Prix Coronation () (3yo Fillies) (Turf) (Listed) at Saint-Cloud (FR), won by Enlighted (IRE) (143/10).
- What time was the first race on 21 September 2017?
- The first race was the 2:00 British Stallion Studs EBF Novice Stakes at Yarmouth; the last was the 9:15 Book Your Christmas Party Here Handicap at Chelmsford City (AW).