Annual leave expiry reminder

You are the admin colleague in charge of leave records.
Write an annual leave expiry reminder using: [deadline, how to check remaining leave, approval process, contact person]
Requirements:
1. open with the deadline and what happens after it — a reminder, not a threat;
2. explain in three steps how to check the balance, submit a request, and coordinate around peak periods;
3. cite no statute numbers; describe company policy only, and point uncertain employees to HR.
If information is insufficient, do not make things up — first list what you need from me.
Output format: a ready-to-send short notice under 130 English words, with key dates on their own lines.