Editing Template:Birth and death year and age (section)

=== <nowiki>{{Death year and age}}</nowiki> ===
Let us assume:
#that the person in question was born some time in {{#expr: {{CURRENTYEAR}} - 51}}; and
#that they died some time in {{#expr: {{CURRENTYEAR}} - 1}}.

*We can posit as two extremes: (1) that the person was born on 31 December {{#expr: {{CURRENTYEAR}} - 51}} and died on 1 January {{#expr: {{CURRENTYEAR}} - 1}}, in which case they would have been 49 years old at the time of their death as they did not achieve their 50th birthday on 31 December {{#expr: {{CURRENTYEAR}} - 1}}; and (2) that they were born on 1 January {{#expr: {{CURRENTYEAR}} - 51}} and died on 31 December {{#expr: {{CURRENTYEAR}} - 1}}, in which case they would have been 50 years old at the time of their death as they had their 50th birthday on 1 January {{#expr: {{CURRENTYEAR}} - 1}}.

::Therefore, the template {{tlx|Death year and age|{{#expr: {{CURRENTYEAR}} - 1}}|{{#expr: {{CURRENTYEAR}} - 51}} }}
::renders their death year and age as: {{death year and age|{{#expr: {{CURRENTYEAR}} - 1}}|{{#expr: {{CURRENTYEAR}} - 51}}}}

*Optionally, if we know the month of the person's death but not the day, we can also have the template display the month. 

:Using the above examples and assuming the month is {{CURRENTMONTH}} ({{CURRENTMONTHNAME}})
::Therefore, the template {{tlx|Death year and age|{{#expr: {{CURRENTYEAR}} - 1}}|{{#expr: {{CURRENTYEAR}} - 51}}|{{CURRENTMONTH}} }}
::displays their death year and age as: {{death year and age|{{#expr: {{CURRENTYEAR}} - 1}}|{{#expr: {{CURRENTYEAR}} - 51}}|{{CURRENTMONTH}}}}

If you wish to set out the full dates of birth and/or death of a person and thus to calculate their age accurately, please use the templates {{tl|Birth date and age}} and {{tl|Death date and age}}.