| Regimental number | 3102 |
| Place of birth | Prahran, Victoria |
| Religion | Baptist |
| Occupation | Carpenter |
| Address | 321 Sydney Road, Brunswick, Victoria |
| Marital status | Married |
| Age at embarkation | 30 |
| Next of kin | Father, A W Day, 321 Sydney Road, Brunswick, Victoria |
| Enlistment date | 13 July 1915 |
| Date of enlistment from Nominal Roll | 18 July 1915 |
| Rank on enlistment | Private |
| Unit name | 5th Battalion, 10th Reinforcement |
| AWM Embarkation Roll number | 23/22/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board RMS Osterley on 29 September 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 5th Battalion |
| Fate | Returned to Australia 28 March 1919 |
| Miscellaneous details (Nominal Roll) | *Spelt Alex Alfred Day on NR |