Cannot find module '@angular/material-moment-adapter'

Just run this command using npm for installing @angular/material-moment-adapter:

npm i @angular/material-moment-adapter

Since @angular/material-moment-adapter requires Angular v5 and up and was only introduced recently (in 5.0.0-rc0), you have to update your dependencies as follows:

npm install -s @angular/{animations,common,compiler,compiler-cli,core,forms,http,platform-browser,platform-browser-dynamic,platform-server,router}@'^5.0.1' rxjs@'^5.5.2'
npm install -E [email protected]

Adapted from https://update.angular.io

EDIT:

Note: As of NPMJS 5, you no longer have to specify the --save flag as this is the default option (see this blog post on changes to NPMJS 5 for more info (under the breaking changes section)):

npm i @angular/{animations,common,compiler,core,forms,platform-browser,platform-browser-dynamic,router}@latest rxjs@latest moment
npm i -D [email protected]

(P.S. The -D flag is an alias of --save-dev)

For those, like me, that also reached this question and already have the lastest @angular 5+.

Don't forget to install Moment.js: npm i moment (as I did )