I want to be able to say 'After the process has begun, there are these time waypoints of 10 seconds, 30 seconds and 70 seconds from the start where I want this action to be performed.'

I suppose I could say milestones, or times. But I was rather hoping for something better than this. I can't use the term events because in the context I'm in that's already a reserved word.

There was another question I found already that was sort of like this, but I couldn't find the answer I wanted and it is now closed. Yet another question concerned a word for a time period, or interval, but I want a word for a marker from an absolute point in time (zero) rather than a relative distance.

  • t+n? "You can start at t+30 or at t+70"
    – Kris
    Nov 28, 2013 at 12:23
  • 1
    erm, timepoint
    – Phil Sweet
    Feb 27, 2020 at 11:42

3 Answers 3


Instant, also moment


2. a particular moment or point in time at the same instant (from Collins Eng.Dict.)

It may be clearer to say 'point on timeline,' though. That expression is already popular.

  • … State Change at certain point on timeline
  • I needed to make “baby arrives” a bigger focal point on timeline :)
  • … determine starting point on timeline
  • Jump to Next 'Interesting Point' on timeline
  • Previewing audio, without losing point on timeline
  • Move to different point on timeline
  • How to position playhead to specific point on timeline.
  • 1
    Keeping the phrasing of the question largely intact, Instant could be used like so: "After the process has begun, there are several instants when I want this action to be performed: start + 10 seconds, 30 seconds and 70 seconds." Feb 26, 2020 at 15:46

I think the word you need is checkpoint.

Its found use in the past few years in the area of Bitcoin and Cryptocurrency. Within the Bitcoin and Cryptocurrency usage, it represents a fixed point in time on the blockchain, at which time certain assumptions can be made that hold true forever.



I believe that you can use epoch.

From Google,

epoch: a particular period of time in history or a person's life; the beginning of a period in the history of someone or something.

or, as you might be interested (Source):

a : an event or a time marked by an event that begins a new period or development

b : a memorable event or date

Given that the context is computer programming, this term is particularly well-suited. I've seen it used in some open-source projects.

  • Note the OP's criterion: "Yet another question concerned a word for a time period, or interval, but I want a word for a marker from an absolute point in time (zero)"
    – Kris
    Nov 28, 2013 at 12:08
  • 1
    @Kris, I'm sure if I understand the word wrong, but according to the usage I usually found in computer program, it is usually used for specifying a point in time, mostly 00:00:00 UTC on 1 January 1970. Nov 28, 2013 at 12:16
  • 1
    Here is what I found from thefreedictionary.com/epoch, epoch: 1. a point in time beginning a new or distinctive period. Nov 28, 2013 at 12:17
  • Epoch is always used in reference to a significant period of time, usually the time period itself, sometimes the beginning of that period (when such a beginning is far more significant than the period itself.)
    – Kris
    Nov 28, 2013 at 12:21
  • @Kris, (Note: I don't want to stir things up, just want to clear up my thoughts) What do you think if in the OP's example, I named the time at 10 seconds, 30 seconds and 70 seconds, as Epoch 1, Epoch 2, and Epoch 3, in that order. I believe that it's fine to use these Epochs to refer to both exact point in time and the period from its start time to the next Epoch. Nov 28, 2013 at 12:27

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