Do I need to apply for an Oman visa one month in advance?

I'm looking at this question and I'm trying to understand the procedure for a tourist visa for Oman. While my question is similar it's a bit different.

I will have a 20 hour layover in January (the 14th, 2020) coming from Nepal. The statement made in the above question is:

Visa must be used for entry to Oman within 1 month of approval.

So, do I need to wait until 1 month (Dec 14th) before I enter Oman to apply as approval can take a few days to a few weeks? I don't see an option during the application process to enter the date of arrival.

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How many days before should we apply for visa?

The Indian visa is valid from the date of issue, and its from three to six months at the discretion of the visa officer. Do not apply too early. If you are going in April, you should apply mid February. Don't worry about the notice by VFS, you will get your visa.

How long does it take to get a visit visa in Oman?

The standard processing time for the Oman eVisa is 24 hours. Applicants are advised to submit an Oman tourist eVisa application at least 4 days before the intended entry to Oman.

When can I apply for a visa to Oman?

Most international visitors need a tourist visa to stay in Oman for longer than 14 days. Only 5 countries enjoy freedom of movement in Oman: Bahrain, Kuwait, Qatar, Saudi Arabia, and the United Arab Emirates. Travelers from over 70 countries are now able to apply for an Oman visit visa online.

When start Oman visa will open?

Oman is now open for tourism, provided visitors meet the COVID-19 health requirements. International tourists can enter Oman if they have been fully vaccinated against COVID-19. Travelers must also meet Oman's visa requirements and hold all the required travel documents for their trip.

How to get the Oman e visa | Requirements, application, cost | All what you need to know

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