UnixTime

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`UnixTime`

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UnixTime[]

gives the total number of seconds since the beginning of January 1, 1970, in the GMT time zone.

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UnixTime[{y,m,d,h,m,s}]

gives the Unix time specification corresponding to a date list.

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UnixTime[date]

gives the Unix time specification corresponding to a DateObject.

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UnixTime["string"]

gives the Unix time specification corresponding to a date string.

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UnixTime[{"string",{"e₁","e₂",…}}]

takes the date string to contain the elements "e_i".

Details

UnixTime[] returns the number of seconds that have elapsed since {1970, 1, 1, 0, 0, 0.} Greenwich Mean Time (GMT), not counting leap seconds.
UnixTime[time] assumes that the given time is in $TimeZone, unless it is a DateObject or TimeObject with an explicit TimeZone option value.
UnixTime[] returns the nearest whole second, down to a granularity of $TimeUnit seconds.
Shorter lists can be used in UnixTime[{y,m,…}]: {y} is equivalent to {y,1,1,0,0,0}, {y,m} to {y,m,1,0,0,0}, etc.
Values of m, d, h, m, s outside their normal ranges are appropriately reduced. Noninteger values of d, h, m, s can also be used.

Examples

open allclose all

Basic Examples (3)Summary of the most common use cases

Unix time in seconds since January 1, 1970:

In[1]:=1

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https://wolfram.com/xid/0tz8cg2a-xcyvc

Out[1]=1

Convert from a date object to Unix time:

In[1]:=1

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https://wolfram.com/xid/0tz8cg2a-194928

Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0tz8cg2a-pa472a

Out[2]=2

Convert from a date string to Unix time:

In[1]:=1

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https://wolfram.com/xid/0tz8cg2a-d9a7n8

Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0tz8cg2a-e4vrff

Out[2]=2

Scope (6)Survey of the scope of standard use cases

Inputs are assumed to be in $TimeZone. Block can be used to specify a different input time zone:

In[1]:=1

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https://wolfram.com/xid/0tz8cg2a-0egeng

Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0tz8cg2a-4tft9p

Out[2]=2

In[3]:=3

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https://wolfram.com/xid/0tz8cg2a-p2038

Out[3]=3

DateObject expressions can include their own TimeZone specification:

In[1]:=1

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https://wolfram.com/xid/0tz8cg2a-9nwv4v

Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0tz8cg2a-2ucfn5

Out[2]=2

Separators are assumed if not specified:

In[1]:=1

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https://wolfram.com/xid/0tz8cg2a-c2j9fo

Out[1]=1

Give explicit separators:

In[2]:=2

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https://wolfram.com/xid/0tz8cg2a-goqhop

Out[2]=2

Date lists are converted to standard normalized form:

In[1]:=1

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https://wolfram.com/xid/0tz8cg2a-beccom

Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0tz8cg2a-i0m90

Out[2]=2

Day, hour, minute, and second values in input date lists can be noninteger:

In[1]:=1

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https://wolfram.com/xid/0tz8cg2a-mpvi5s

Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0tz8cg2a-kqxw4m

Out[2]=2

The current year is used if not specified in a string:

In[1]:=1

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https://wolfram.com/xid/0tz8cg2a-hv4zf

Out[1]=1

Properties & Relations (2)Properties of the function, and connections to other functions

UnixTime converts a date specification into Unix time form:

In[1]:=1

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https://wolfram.com/xid/0tz8cg2a-w3zjj3

Out[1]=1

FromUnixTime converts back into a DateObject expression:

In[2]:=2

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https://wolfram.com/xid/0tz8cg2a-r1gtm0

Out[2]=2

Compute the number of seconds between January 1, 1900, and January 1, 1970:

In[1]:=1

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https://wolfram.com/xid/0tz8cg2a-fpi6ke

Out[1]=1

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