Unexpected results when filtering MongoDB documents by date range in Node.js with Mongoose
I'm deploying to production and I'm writing unit tests and I just started working with I've searched everywhere and can't find a clear answer... Hey everyone, I'm running into an issue that's driving me crazy. I'm trying to filter documents from a MongoDB collection based on a date range using Mongoose in my Node.js application, but I'm getting unexpected results. My documents have a `createdAt` field stored as a Date type, and I'm using the following query: ```javascript const startDate = new Date('2023-10-01'); const endDate = new Date('2023-10-31'); const results = await YourModel.find({ createdAt: { $gte: startDate, $lte: endDate } }); ``` The scenario arises when I try to run this code; it returns documents not just from October but also from September. I checked the `createdAt` field in my MongoDB documents and confirmed they're indeed stored as Date objects. When I log the `startDate` and `endDate`, they appear correct: ```javascript console.log('Start Date:', startDate); console.log('End Date:', endDate); ``` The output shows: ``` Start Date: 2023-10-01T00:00:00.000Z End Date: 2023-10-31T00:00:00.000Z ``` I suspect there might be an scenario with time zones, as I didn't specify a local time zone while creating the Date objects. I’m running this on Node.js v18.0 and using Mongoose v6.6.0. I've tried converting the dates to UTC by using `toISOString()` method, but it didn’t solve the question. Could this be a time zone scenario, or is there something else I'm overlooking? Any help would be appreciated! This is part of a larger API I'm building. Any ideas what could be causing this? Is there a better approach? I'd be grateful for any help. I'm on macOS using the latest version of Javascript.