One Day Leave Application For Office: Format & Tips (+12 Samples)

A leave application is something most of us have been taught to write since school. Yet, when the time comes to write one professionally—especially a one-day leave application for the office—we often find ourselves wondering: What’s the correct format? How should I begin? Do I need to mention every detail?

Don't worry; we’ve got you covered.

In this article, you'll find clearly written examples and practical tips to help you write a professional one-day leave application that informs your manager effectively—without sounding too long or too casual.

What is a One-Day Leave Application & its Purpose?

A one-day leave application is a formal request made by an employee to take a day off from work for personal, medical, urgent, or other reasons. While it might seem like a minor thing, even a single day’s absence can impact team coordination and timelines—especially in collaborative or deadline-driven environments. That’s why it's important to submit a well-written application, even for just one day.

Doing so serves multiple purposes:

• It informs your manager of your unavailability in advance.
• It allows for your responsibilities to be temporarily reassigned.
• It reflects professionalism and respect for workplace protocols.
• It helps avoid confusion, last-minute reshuffling, or delays.

Whether you're stepping away for a family commitment, a health check-up, or a personal errand, a short formal application keeps communication smooth and professional. This is especially true when your leave is planned in advance. But even if it's a last-minute emergency, it's still better to send a quick, well-drafted message than none at all.

Don’t worry—we’ll show you exactly how to write one. In the sections below, you’ll find a step-by-step guide along with sample one-day leave applications, including formats for emergency situations.

What to Include in a One-Day Leave Application

Whether it’s written in an email, letter, or company portal, a one-day leave application for office should typically include the following elements:

• Salutation: Address the letter to your reporting manager or concerned authority. Use their first name or full name, depending on your workplace's formal tone.
• Subject Line: Clearly mention the purpose.
• Reason for Leave: Mention the reason in one or two sentences. No need to go into detail.
• Duration and Date: Specify that it is a one-day leave and mention the date.
• Work Plan: Optionally, include how your work will be managed in your absence—especially if your tasks are time-sensitive.
• Closing Line: Thank your manager and express willingness to make up for the lost time, if necessary.
• Your Details: Sign off with your name, job title, and the date you’re submitting the application.

How to Write a One-Day Leave Application (Step-by-Step Guide)

Writing a one-day leave application doesn’t have to be complicated. But it should be clear, respectful, and complete. Here's a step-by-step breakdown to help you write one that gets approved without any back-and-forth.

1. Start with a Proper Salutation

Address the application to the appropriate authority — usually your reporting manager or HR. Use a respectful greeting such as:

Dear [Manager's Name],
Respected Sir/Madam,

Tip: Use the name if you’re on a first-name basis; otherwise, stick to formal titles.

2. Mention the Subject Line (If Sending an Email)

Keep the subject line straightforward. This helps the recipient understand the purpose immediately.

Subject: Leave Application for [Date]
Subject: Request for One-Day Leave on [DD/MM/YYYY]

3. Clearly State the Reason for Leave

Mention your reason briefly, without too many details. Keep it professional, even if the reason is personal.

I would like to request a one-day leave on [date] to attend a family function.
I am feeling unwell and would like to rest and recover before returning to work.

Avoid vague terms like “personal work” if possible. Give just enough context to make the reason reasonable.

4. Specify the Leave Date and Duration

State the exact date you intend to take off and confirm that it’s for a single day.

I kindly request leave for [date], which will be a one-day absence from work.

If the leave was unexpected and you're writing after the fact (e.g., in an emergency), acknowledge the short notice:

Due to an unforeseen medical emergency, I was unable to attend work on [date]. I apologize for the short notice and request approval for the leave.

5. Mention Work Handover or Responsibility Management

Let your manager know you've taken steps to ensure your work won’t suffer.

I’ve informed [colleague’s name] and shared the necessary updates so that there’s no disruption in my absence.

This signals responsibility and thoughtfulness.

6. Close with Gratitude and Contact Availability (if needed)

Wrap up your application on a courteous note. You may also mention if you’ll be reachable.

Thank you for considering my request. Please let me know if any additional information is required.
I’ll be available on phone/email should anything urgent come up.

7. Sign Off Professionally

Use a formal sign-off with your name and designation.

Sincerely,
Best regards,
[Your Name]
[Your Designation]

One-day Leave Application Samples and Templates

Below are one-day leave application samples and templates that you can customize based on your specific reason for leave.

Sample 1: One-day Sick Leave Application

Subject: One-day Sick Leave Request for [Date]
To: [Manager's Name]

Dear [Manager's Name],

I hope you are doing well. I am writing to inform you that I am feeling unwell and would like to request a one-day sick leave on [Date]. I am experiencing mild fever and fatigue and believe that taking rest will aid a quicker recovery. I have ensured that my work is either completed or covered by my colleague.

Thank you for your support and understanding.

Sincerely,
[Your Name]
[Designation]
[Date]

Also Read: How To Write Sick Leave Application For Office With Sample Emails

Sample 2: One-day Leave Application for Medical Appointment

Subject: Leave Request for Medical Appointment on [Date]

Dear [Manager's Name],

I would like to request a one-day leave on [Date] to attend a scheduled medical appointment. I have attached the appointment confirmation document for your reference. I will ensure that all urgent tasks are completed in advance, and I’ve also briefed my team to manage any important matters in my absence.

Thank you for your understanding.

Regards,
[Your Name]
[Designation]
[Date]

Sample 3: One-day Leave Application for an Emergency (Template)

Emergencies arise unexpectedly, and when they do, it’s important to communicate your absence to your manager as clearly and promptly as possible. Below is a template you can refer to for requesting a one-day emergency leave.

Subject: Leave Request Due to Emergency on [Date]
To: [Manager's Name]

Dear [Manager's Name],

I regret to inform you that I am currently dealing with a [brief mention of emergency—e.g., family emergency, urgent personal matter] that requires my immediate attention. I kindly request a one-day leave on [Date] to address the situation. I have requested my teammate, [Colleague’s Name], to manage any critical tasks in my absence. I will remain reachable if needed.

I appreciate your support during this time.

Sincerely,
[Your Name]
[Designation]
[Date]

Sample 4: One-Day Leave Application to Attend a Workshop (Template)

Subject: Request for One-day Leave to Attend Workshop on [Date]
To: [Manager's Name]

Dear [Manager's Name],

I would like to request a one-day leave on [Date] to attend a [brief description—e.g., professional development workshop, skill enhancement session]. I believe this workshop will contribute to my professional growth and benefit our team as well. I’ve arranged for my responsibilities to be managed during my absence.

Thank you for your consideration.

Sincerely,
[Your Name]
[Designation]
[Date]

 Sample 5: One-day Leave Application for Personal Reasons

Subject: One-day Leave Request for Personal Reasons on [Date]

Dear [Manager's Name],

I am writing to request a one-day leave on [Date] due to personal reasons that require my attention. All my current tasks are on schedule, and I will ensure that any pending work is managed before or after my absence.

I appreciate your understanding.

Sincerely,
[Your Name]
[Designation]
[Date]

Sample 6: One-day Leave Application for Festivals (Template)

Subject: One-day Leave Request for [Festival Name] on [Date]

Dear [Manager's Name],

I would like to request a one-day leave on [Date] to celebrate [Festival Name] with my family. This day is of personal and cultural significance to me. I’ve ensured that my ongoing work is in order and have informed my team about my absence.

Thank you for your support.

Warm regards,
[Your Name]
[Designation]
[Date]

Sample 7: One-day Leave Application for Family Function

Subject: One-day Leave Request for Family Function on [Date]

Dear [Manager's Name],

I am writing to request a one-day leave on [Date] to attend a family function. All my tasks are either completed or delegated, and I have communicated with my team to ensure workflow continuity.

Thank you for your consideration.

Sincerely,
[Your Name]
[Designation]
[Date]

Sample 8: One-day Leave Application for Child’s Illness

Subject: Leave Request Due to Child’s Illness on [Date]

Dear [Manager's Name],

I am writing to request a one-day leave on [Date] as my child is unwell and needs my care. I have made arrangements to ensure that my work is not disrupted during this time and will remain available for any urgent matters.

Thank you for your understanding.

Regards,
[Your Name]
[Designation]
[Date]

Sample 9: One-day Leave Application for Exam

Subject: One-day Leave Request for Examination on [Date]

Dear [Manager's Name],

I would like to request a one-day leave on [Date] to appear for a scheduled examination. I have planned my work in advance to ensure that nothing is left pending and will coordinate with my team as required.

I appreciate your support.

Sincerely,
[Your Name]
[Designation]
[Date]

Sample 10: One-Day Leave Application for Urgent Household Emergency

Subject: One-day Leave Request for Urgent Household Matter on [Date]

Dear [Manager's Name],

I would like to request a one-day leave on [Date] due to an urgent household emergency that needs my attention. I have updated my team regarding my absence and have ensured coverage for all immediate responsibilities.

Thank you for your understanding.

Best regards,
[Your Name]
[Designation]
[Date]

Sample 11: One-day Casual Leave Application

Subject: Request for One-day Casual Leave on [Date]

Dear [Manager's Name],

I am writing to request a one-day casual leave on [Date]. I have ensured that my current responsibilities are on track and have informed my team to manage any immediate requirements during my absence.

Please let me know if any additional information is required.

Thank you for your consideration.

Sincerely,
[Your Name]
[Designation]
[Date]

Also read: Know Everything About Casual Leaves: Meaning, Types, Application Format & Samples

Sample 12: One-day Leave Application for Mental Health

Subject: Request for One-day Leave on [Date]
To: [Manager's Name]

Dear [Manager's Name],

I would like to request a one-day leave on [Date] to focus on my mental well-being. Taking this brief time off will help me recharge and return with better focus and energy. My ongoing tasks are either completed or delegated, and I have informed my team to ensure smooth coordination in my absence.

Thank you for your support and understanding.

Sincerely,
[Your Name]
[Designation]
[Date]

These one-day leave application samples/templates are meant to guide you in writing clear, respectful, and effective leave requests for different situations. You can customize any of these templates to suit your specific needs.

One-day Leave Application Messages for WhatsApp

In today’s fast-paced work environment, many professionals use WhatsApp or instant messaging to quickly communicate leave requests. Writing a clear and polite leave message on WhatsApp can help ensure your manager understands your situation while maintaining professionalism.

Here are some practical WhatsApp leave message templates for different situations:

Template 1: One-day Sick Leave

Hi [Manager's Name], I’m feeling unwell today and need to take a sick leave for the day. I’ve informed [Colleague’s Name] to cover urgent tasks. Thanks for understanding.

Template 2: One-day Leave for Medical Appointment

Hello [Manager's Name], I have a medical appointment scheduled for today and will need to take a leave for the day. I’ve planned my work to avoid disruption. Please let me know if you need anything.

Template 3: Emergency Leave

Hi [Manager's Name], I have an urgent personal matter to attend to and will be taking a leave today. I’m reachable if anything urgent comes up. Thank you for your support.

Template 4: Casual Leave

Hey [Manager's Name], I’d like to take a casual leave today. All my tasks are on track, and I’ve briefed the team. Let me know if you need anything from me.

Template 5: Mental Health Leave

Hi [Manager's Name], I need to take a day off to focus on my mental health and recharge. I’ve ensured my work is managed for the day. Thanks for understanding.

Note: Requesting leave via quick messaging apps like WhatsApp is acceptable only if your company culture allows it. Otherwise, it’s best to write a formal one-day leave application email.

Also read: Half-Day Leave Application - Format & Samples For Common Reasons

Tips for Writing a One-day Leave Application for Office

Crafting a clear and professional leave application not only helps communicate your absence effectively but also reflects your respect for workplace protocols and consideration for your team. Here are some tips you must keep in mind when framing your one-day leave application:

1. Use a Formal Format and Professional Tone
   Always follow a standard formal letter format. Maintain a respectful and professional tone throughout, regardless of your relationship with your manager. This shows seriousness and respect for workplace norms.
2. Be Clear and Specific About the Leave
   Clearly state the reason for your leave and the exact date you will be absent. Keep it concise but informative. If your company requires documentation for certain types of leave (like medical certificates), be sure to mention that you will provide them.
3. Submit Your Leave Request Early
   Whenever possible, submit your leave application at least 3 to 4 days in advance for planned leaves. For emergencies, notify your manager as soon as possible to avoid any confusion or disruption.
4. Communicate Your Work Status and Coverage
   Explain how your responsibilities will be managed during your absence. Mention if a colleague will cover urgent tasks or if you have rescheduled deadlines to ensure no disruption to ongoing projects.
5. Use the Appropriate Medium
   Depending on your company culture, submit your leave request via official letterhead or email. Emails are widely accepted and often preferred for their ease of tracking, but formal letterhead may be required in some workplaces.
6. Attach Relevant Supporting Documents
   For leaves related to health or emergencies, attach necessary documents such as a doctor’s note or appointment confirmation. This builds credibility and fulfills company policies.
7. Follow Up to Confirm Approval
   After submitting your application, follow up with your manager to confirm they received and approved your leave. This helps avoid last-minute misunderstandings and ensures a smooth workflow in your absence.

Conclusion

Writing a clear and professional one-day leave application is essential for maintaining good communication and ensuring your responsibilities are managed smoothly during your absence. Whether you are requesting leave for sickness, personal reasons, or emergencies, following a formal format, providing relevant details, and informing your manager about your work status can make the process seamless. Remember to submit your request well in advance when possible, attach any necessary supporting documents, and follow up to confirm approval. With the right approach, your leave application will be respectful, effective, and well-received.

Frequently Asked Questions

Q1. What is a one-day leave application?

A one-day leave application is a formal request submitted to your manager or HR to take a day off from work for a specific reason, such as illness, personal matters, or emergencies.

Q2. How do I write a one-day leave application?

Use a professional tone and format, clearly state the reason for leave, mention the date, update your manager about your work status, and attach any relevant documents if required.

Q3. When should I submit a one-day leave application?

Submit it ideally 3-4 days in advance for planned leaves. For emergencies, inform your manager as soon as possible.

Q4. Can I request one-day leave via WhatsApp?

Yes, if your company culture permits quick messaging apps for official communication. Otherwise, use a formal email or letter.

Q5. Should I attach medical documents with my sick leave application?

If your company policy requires it, always attach supporting medical documents like a doctor’s note or appointment confirmation.

Q6. What if my leave application is rejected?

If rejected, discuss alternative options with your manager, such as rescheduling your leave or working remotely if possible.

This compiles our discussion on one-day leave applications. We have covered many more articles on leave applications. Take a look:

1. Leave Application For Sister’s Wedding With Samples
2. Writing A Leave Application For Marriage (With Template & Examples)
3. 8 Of The Most Common Types Of Leave In A Company
4. Paternity Leave Application: How-to, Format, Samples, And More
5. How To Write A Maternity Leave Application: Find Format, Samples, Do's & Don'ts