How to convert JD to date, please? Here is the solution in the opposite direction.
For instance, 2416834.8134 is 20.12.1904
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Possible duplicate of https://stackoverflow.com/questions/37743940/how-to-convert-julian-date-to-standard-date – Mohit Khandelwal May 12 '21 at 17:38
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Where is the definition of JD? The link you gave has another link that's supposed to explain it, but it's dead. – Mark Ransom May 12 '21 at 17:38
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@MohitKhandelwal unlikely, the range of numbers is completely different. – Mark Ransom May 12 '21 at 17:40
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I have look at that question, but it is different. – Elena Greg May 12 '21 at 17:43
1 Answers
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You can convert julian date to python datetime as follows:
import math
from datetime import datetime
BASE_JD = 1721424.5 # Julian date of 1 January, 1
user_JD = 2416834.8134
date = datetime.fromordinal(math.floor(user_JD - BASE_JD))
# Output: datetime.datetime(1904, 12, 20, 0, 0)
Julian date of 1 Jan, 1 is taken from Julian date variants - wikipedia.
To print this date in any desired format, datetime.strftime method can be used
date.strftime('%d.%m.%Y')
# Output: '20.12.1904'
Documentation-
datetime.fromordinal: "Return the datetime corresponding to the proleptic Gregorian ordinal, where January 1 of year 1 has ordinal 1"
Mohit Khandelwal
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Many thanks. I obtained an error: AttributeError: 'module' object has no attribute 'fromordinal' – Elena Greg May 12 '21 at 18:44
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