# How to Convert Ancient Era Dates Into Modern Ones

Updated on June 21, 2012

How do you convert a date in an ancient era into a BC/AD date of the Common Era which is based on the Christian Calendar?

Well folks… don’t worry! Simple arithmetic will suffice here.

## For an Era which started in Some BC

Suppose the Era started in “A” B.C and we need to find the Christian year for the Xth year of that Era.

Let the required Christian year be B then

B = X – A

For example, the year 179 of the Vikrama Era which began in 58 BC is

179 – 58 = 121 BC

## For an Era which started in some AD

Suppose the Era started in “A” A.D and we need to find the Christian year for the Xth year of that Era.

Let the required Christian year be B then

B = X + A

For example, the year 179 of the Shaka Era which started in 78 A.D is

179 + 78 = 257 AD

## Variations

There may be certain variations depending on whether the months mentioned are Lunar or Solar moths.

The month is important because the traditional Indian year did not begin in the same month as th Western year which begins in January.

Another point of confusion is whether the year in the inscription is to be understood as the expired year or the current year. This is sometimes but not always indicated in the text.

For example

When we celebrate a child’s first birthday

- He completes a year according to the expired theory

- He begins the second year according to the current theory

In spite of these issues if an inscription is dated in a known Era, it is possible to pin it down within a narrow margin.

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## Popular

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Jessee R 5 years ago from Gurgaon, India

Thanks Frank! Your compliments are always more Fun trust me :)

• Author

Jessee R 5 years ago from Gurgaon, India

Oh Sir Bill! I am too young to educate you! thank you so much for such a warm remark

• Author

Jessee R 5 years ago from Gurgaon, India

Thanks Mark! Glad you liked it

• Author

Jessee R 5 years ago from Gurgaon, India

Thank you myownlife

• Author

Jessee R 5 years ago from Gurgaon, India

You're right Chasuk. It is a mistake on my part and I must make amends ri8 away... thank you for notifying

• Frank Atanacio 5 years ago from Shelton

Mister Diverse.. thank you :) it was kind of a fun share voted up

• Bill Holland 5 years ago from Olympia, WA

Well that was very interesting Rahul; thank you for educating this old teacher. Very well done!

• markbennis 5 years ago

Interesting and I guess very useful too, thanks for sharing…

• myownlife 5 years ago from london

Apparently very useful. great

• Chasuk 5 years ago

You might want to include a bit of information for the majority of readers who won't know that this calendar is used in Nepal and India.

• Author

Jessee R 5 years ago from Gurgaon, India

Thank you Rajan Sir

• Author

Jessee R 5 years ago from Gurgaon, India

Well I believe history is above the dates... Don't worry.. this one is quite easy.. just Math...

Thank you max, appreciate your Visit

• Author

Jessee R 5 years ago from Gurgaon, India

hahaha... LOL.. I will try telling that to some one Beck! Thank you so much for visiting!!

• Author

Jessee R 5 years ago from Gurgaon, India

Thanks Pooja... I hope your kids have fun

• Author

Jessee R 5 years ago from Gurgaon, India

Thank Whyd

• Rajan Singh Jolly 5 years ago from From Mumbai, presently in Jalandhar,INDIA.

Useful and interesting Rahul.

Voted up, useful and interesting & shared.

• BeyondMax 5 years ago from Sydney, Australia

It sound so easy, perfect explanation! But I'm sure I'll be tripping over myself when I'll try convert the date (never been good with history LOL not to mention dates... I don't even know what date is today, except that it's Friday =))

• Shining Irish Eyes 5 years ago from Upstate, New York

Your wealth of knowledge is endearing and interesting.

By the way - when ever someone turns a year older, I remind them to add a year to the number on the cake, since they burned up the first one before their first birthday! Lost a lot of friends over it! LOL

• Dr Pooja 5 years ago

Great !! exactly what i needed to teach my daughter.Voted up and shared

• WhydThatHappen 5 years ago

Useful conversion formula

working