#Batch, 41 25 bytes

^{-8 bytes thanks to AdmBorkBork
-6 bytes thanks to ceilingcat
-2 bytes thanks to inspiration from Neil}

ping 1 -n 31556952000>nul

Using 31,556,952 seconds / year and a (default) 1 second delay between each ping, this will wait 1000 years before returning nothing.

Note that ping 1 results in failure but it'll fail 31 billion times so that still works.

Batch, 41 25 bytes

^{-8 bytes thanks to AdmBorkBork
-6 bytes thanks to ceilingcat
-2 bytes thanks to inspiration from Neil}

ping 1 -n 31556952000>nul

Using 31,556,952 seconds / year and a (default) 1 second delay between each ping, this will wait 1000 years before returning nothing.

Note that ping 1 results in failure but it'll fail 31 billion times so that still works.

#Batch, 41 bytes

ping 192.0.2.2 -n 1 -w 31556952000000>nul

Using 31,556,952,000 milliseconds / year, this will wait 1000 years before returning nothing.

#Batch, 41 25 bytes

^{-8 bytes thanks to AdmBorkBork
-6 bytes thanks to ceilingcat
-2 bytes thanks to inspiration from Neil}

ping 1 -n 31556952000>nul

Using 31,556,952 seconds / year and a (default) 1 second delay between each ping, this will wait 1000 years before returning nothing.

Note that ping 1 results in failure but it'll fail 31 billion times so that still works.