Are all the leaves drying out, or just the oldest ones?

Also, what are their growing conditions (indoors or outdoors), how are you fertilizing them?

Yes, on the first plant all the leaves seem to suffer, the other plant is a bit better. Both are indoor - however, outside temperature is around -6°C, so it could be a bit cooler for them even indoors. I don’t fertilize them any special, just a bit of casual fertilizer for all kinds of plants.:)

Regular date palms make terrible house plants, so they will probably continue to decline, especially if you are not providing additional grow light for at least 12 hours a day.

Pygmy date palms, on the other hand make nice houseplants because they tolerate lower light levels. They don't like the cold, though.

So it all depends on what you have. Where did you get the seeds?

Fertilizing any container plant is a must because there are no nutrients in potting mixes -- there are palm formulas you get get online.

Thanks a lot for your advice! I’ve putted them above the heater on the windowsill and one of them survived and now is doing much better. The other one died, however, it was in very poor condition already back than, so it is not a big surprise. Thank you once more. Greetings🌸