Wear-time guides
How long does eau de toilette last
Eau de toilette has no universal number of lasting hours. EDT is a concentration-style descriptor, not a countdown, and some exact products may suit your routine better than a more concentrated interpretation.
A HUME Fragrance buying guide

Avoid ranking labels alone
A bright EDT and a woody perfume can have different perceptual behavior because their compositions differ. The term does not resolve that comparison by itself.
Keep the application identifiable
Record the exact product and dispenser. Equal spray counts from different atomizers do not necessarily mean equal amounts were applied.
Check the later character
A scent becoming quieter is different from becoming unpleasant or disappearing entirely. Record what remains and whether you still enjoy it before deciding to refresh.
Try this before you buy
For one EDT trial, note the later character and close-range presence separately from the initial brightness.