Hello

That's like 2lbs a week. And unless you have a lot of weight to lose, it's on the upper end of being aggressive. A 1,000 calorie deficit a day and if you're only alotted less than 2000 calories a day, you'll be under 1000 calories a day and that's not a good thing because you're likely undernourishing your body.
If it's for an event, you should have started in January.

A.C.E. Certified Personal and Group Fitness Trainer
IDEA Fitness member
Kickboxing Certified Instructor
Been in fitness for 40 years and have studied kinesiology and nutrition

Some goals are admirable and achievable, and some might not be so wise… It’s fine to set a goal if a) it isn’t too aggressive and unhealthy for your current weight (see excellent points from @ninerbuff) and b) you’re the type of person that thrives on a (publicly declared) personal challenge. However, do consider how you might react if it doesn’t go to plan… are you an ‘all or nothing’ type who will throw in the towel and eat an entire cheesecake (or two) to punish yourself, or will you sit down calmly to try and figure out a better way?

[I myself have a stubborn AND competitive streak, so if someone tells me something isn’t possible I will move heaven and earth to prove them wrong: that’s great in many areas of life, but it doesn’t necessarily mean it’s always in my best interests.]

I lost weight ‘successfully’ (i.e. fairly rapidly, to a goal), for a specific purpose a few times previously - but of course it wasn’t successful because I put it ALL back on again… I wasn’t figuring out what happens after getting to goal, when the (fun, exciting, adrenaline-fuelled) challenge was ‘over’. I finally decided to do it for ME and my future health and wellbeing - not to fit into a particular size dress for an event - and it’s been a completely different experience… truly mind blowing-ly different. I am now in ‘maintenance’ and I plan to be here FOREVER. That’s a much bigger, bolder, trickier (but much more boring) challenge, but I assure you I am very much in it to win it!

I sincerely wish you the best of luck, and keep us updated?