TL;DR: for a job interview, the most shared rule is simple: less is more — a light, clean perfume, or none at all. For a date, you can allow yourself a bit more personality, but always in moderation.
Job interviews: why "less" is almost always the right answer
This is one of the topics that comes up most often among perfume enthusiasts: the most frequent answer to "what perfume should I wear for an interview" is simply to skip it, or limit yourself to a single spray of something very discreet. The goal of an interview isn't to be remembered for your perfume, but for your overall presentation — a perfume that's too present can distract or even bother a scent-sensitive interviewer.
If you do want to wear something, favor clean, light compositions: fresh citrus, aquatic notes, or perfumes described as evoking clean laundry rather than woody, sweet, or heavily marked compositions.
Dates: a bit more latitude, still with restraint
For a first date, the constraint is less strict: the idea is to choose a perfume that feels like you and makes you feel confident, without overwhelming the shared space (restaurant, car, enclosed venue). Many collectors recommend testing the chosen perfume several hours ahead of time, to check how it evolves once it settles into the base, rather than relying only on the first impression at application.
The everyday office: somewhere in between
For regular professional use, the same principle of discretion generally applies better than an overly marked perfume: a colleague should only notice your perfume when they get close, not the moment they walk into the room.
The rule that comes up in almost every discussion
Whatever the professional or social occasion, the advice that comes up most often among enthusiasts is the same: when in doubt, apply less than you think you need. It's easier to add a spray later in the day than to make an overly present perfume disappear.