Syntax for compile date & time in the code

Projects Programming
1

Trying to help members I've seen a compiler command that stamps the code with date and time. Something like __DD__TT..... Searching for it now.
Any member having a better memory than I?
Trying to identify old code and keep them apart is the reason.

2

Perhaps you mean __TIMESTAMP__?

3 
__DATE__ __TIME__

Two underscores before and after.

4

something like this may be?

const char * compiledOn = "compiled: " __DATE__ "\t" __TIME__;

void setup() {
  Serial.begin(115200);
  Serial.println(compiledOn);
}

void loop() {}
5

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