Investing regularly is crucial. It is inevitable that the market will have pullbacks, so some of your contributions could be made during these times. This alone worries a lot of employees and some may not want to invest regularly out of fear of MOST of their contributions doing the same.
But the truth is that some of what you contribute will also go in while the market is high. What this means is that they’ll average out. If you do not invest, you’ll be far more likely to lose money by staging on the losing end of the spectrum.
Don’t take a month off, keep investing!