The honest answer depends on the occasion and the day of the week. Saturdays disappear first, wedding season (spring and autumn) compresses everything, and school formal weeks book out suburb by suburb. Here's a realistic guide for Sydney.
Weddings: 3–9 months out
Most Sydney brides lock in hair and makeup 3–9 months ahead, and popular Saturday dates in October–November and March–April go earliest. If you want a trial (recommended), book early enough to fit it in a month or two before the day. See what's involved in wedding & bridal makeup.
Formals: 4–8 weeks out
Formal season is intense — when one school's date lands, every artist nearby fills that evening. As soon as you know your date, book. Group bookings with friends are worth arranging early so everyone's on one timeline. More on formal & event makeup.
Parties, races and events: 2–4 weeks out
Weeknight and Sunday events are usually easy to book a couple of weeks ahead. Saturday nights, race days and long weekends behave more like formal season — earlier is safer.
What if my date is this week?
Ask — genuinely. Cancellations happen and weekday mornings often stay open. On Glamr you can see live availability on the calendar instead of emailing for quotes: if your date shows as open, it's bookable right now with a small deposit. Check availability.
Why booking early costs nothing
You don't pay more for booking ahead — you pay a small deposit to hold the date and the balance on the day. The only thing early booking costs you is the risk of missing out. Find your suburb — from the Eastern Suburbs to the Sutherland Shire and Western Sydney — and check your date.