Evaluate

Basic Examples

It is presently:
Now
In[]:=
Wed 3 Jul 2019 15:15:05GMT-5.
Out[]=
[◼]
SecondsToday
[]
In[]:=
54907.635490
Out[]=

Applications

Wait 3 seconds:
t0=
[◼]
SecondsToday
[];​​Pause[3];​​
[◼]
SecondsToday
[]-t0
In[]:=
3.002011
Out[]=

Possible Issues

Fractions of a second are, at least, at a resolution of $TimeUnit.