Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Equity - date of offer, or date of joining?
TL;DR: The date they were granted.  (Usually, this follows both an offer and acceptance.) It's not uncommon for a new vesting clock to start when there's a new round of funding coming in, because the investors want to make sure the key people are going to be engaged and incentivized going forward from that point.  They don't lower their expectations for how long they want folks engaged based on the person having started earlier.  Non-institutional investors may have the same concerns as institutional investors here and use the same vesting strategy to address them. Primary recognition of the benefits from having had people start earlier or be there longer (so long as it correlates with having gotten more done) is embedded in the valuation (which affects how much founders' shares are diluted in the raise).