$year / $month / $dayOfMonth
Reference group: Date expressions
What it does
Extracts calendar components; timezone affects local calendar boundaries.
Syntax
Date-part expressions with optional timezone
Use case
Group/display by local date.
$year / $month / $dayOfMonth: practical example
{ $project: { year: { $year: { date: "$createdAt", timezone: "Asia/Kolkata" } }, month: { $month: "$createdAt" } } }💡 Explanation
Extracts calendar components; timezone affects local calendar boundaries.
When to use it
Group/display by local date.
Key Takeaways
- Extracts calendar components; timezone affects local calendar boundaries.
- Typical use: Group/display by local date.