When to harvest my first Matic Light (Dane strain)

Hi good people of Earth.

Hope you're all doing fine wherever you are. I'm in the north. It's been minus -17 / -20 degrees Celsius this past week and it's butt cold, so to keep spirits high and my body warm, I'm waiting in anticipation on my little buddy, which is an auto flower kind named "Matic Light" (Northern light + Blue Matic) to be ripe for plucking. Problem is, it's my first grow and I have no idea when I can start harvesting it. Therefore, I'm reaching out to the expertise of the people on this site to help provide some guidelines or motivational words or tips and tricks.

The details of my setup (simple as it might be), is as follows:

• 1 spider LED lamp - wavelenght range : 370 - 850 nm.
• 12 liter plastic bucket
• 18/6 light schedule
• organic soil from my local flower shop (the availability here on different kind of medium and soil is very limited)
• the provider of the seed informs me that it's ready to harvest ~67 days from seed.

It's been 69 days since the little fella sprouted and the top buds looks like the attached image.

Should I harvest or should I endure the torment of waiting a couple days or perhaps a week?

I'm interested in hearing your thoughts on this.

I would say it needs longer, man. Those hairs are still pretty white. The only way to know for sure is to go get yourself a pocket microscope (30x magnification should work) and look at the trichomes to see their readiness. There are probably 1,000 and a half guides online with pictures to refer to.

Edit: oh, and the breeder time is *rarely* ever the actual time. You should add two or so weeks to whatever a breeder says.