Hanreki was originally a calendar to be distributed to government offices, nobles and monks made it a practice to ask rekihakase or rekisei to make or transcribe guchureki in order to write their own diary (on this point, it is known that FUJIWARA no Sanesuke ordered calendars to an onmyoji (practionner in the Onmyoryo) by paying for paper and paid one hiki of silk when the calendar was completed (according to the article of "Chuyuki" (diary written by FUJIWARA no Munetada) dated on October 2nd, 1014) and the line of regents and advisers made it rule that rekihakase presented guchureki to them (according to "Gonijo Moromichi ki" (The Diary of FUJIWARA no Moromichi), "Denryaku" (The Diary of FUJIWARA no Tadazane) and ''Gyokuyo" (The Diary of Kanezane KUJO)).
また、元々頒暦が官庁に備え付ける暦であり、貴族や僧侶は自らの日記を執筆するために用いる具注暦をそれぞれが暦博士や暦生に依頼して制作もしくや書写の便宜を受けるのが慣例となっていた（藤原実資は予め（陰陽寮職員である）陰陽師に料紙を支給して暦を注文を行い、完成後に代金として絹1疋を支払っていたことが知られ（『中右記』長和3年10月2日条）、摂関家に至っては暦博士側から具注暦を献上してくることが慣例化していた（『後二条師通記』・『殿暦』・『玉葉』）。